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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">“Don’t forget the migrants”: exploring preparedness and response strategies to combat the potential spread of MERS-CoV virus through migrant workers in Sri Lanka</title>
<author><name sortKey="Wickramage, Kolitha" sort="Wickramage, Kolitha" uniqKey="Wickramage K" first="Kolitha" last="Wickramage">Kolitha Wickramage</name>
<affiliation><nlm:aff id="a1">Health Department, International Organization for Migration (IOM), Colombo, Sri Lanka</nlm:aff>
</affiliation>
</author>
<author><name sortKey="Peiris, Sharika" sort="Peiris, Sharika" uniqKey="Peiris S" first="Sharika" last="Peiris">Sharika Peiris</name>
<affiliation><nlm:aff id="a1">Health Department, International Organization for Migration (IOM), Colombo, Sri Lanka</nlm:aff>
</affiliation>
</author>
<author><name sortKey="Agampodi, Suneth B" sort="Agampodi, Suneth B" uniqKey="Agampodi S" first="Suneth B" last="Agampodi">Suneth B. Agampodi</name>
<affiliation><nlm:aff id="a2">Department of Community Medicine, Faculty of Medicine and Allied Sciences, Rajarata University of Sri Lanka, Saliyapura, Sri Lanka</nlm:aff>
</affiliation>
<affiliation><nlm:aff id="a3">Tropical Disease Research Unit, Faculty of Medicine and Allied Sciences, Rajarata University of Sri Lanka, Saliyapura, Sri Lanka</nlm:aff>
</affiliation>
</author>
</titleStmt>
<publicationStmt><idno type="wicri:source">PMC</idno>
<idno type="pmid">24555078</idno>
<idno type="pmc">3886786</idno>
<idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3886786</idno>
<idno type="RBID">PMC:3886786</idno>
<idno type="doi">10.12688/f1000research.2-163.v1</idno>
<date when="2013">2013</date>
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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">“Don’t forget the migrants”: exploring preparedness and response strategies to combat the potential spread of MERS-CoV virus through migrant workers in Sri Lanka</title>
<author><name sortKey="Wickramage, Kolitha" sort="Wickramage, Kolitha" uniqKey="Wickramage K" first="Kolitha" last="Wickramage">Kolitha Wickramage</name>
<affiliation><nlm:aff id="a1">Health Department, International Organization for Migration (IOM), Colombo, Sri Lanka</nlm:aff>
</affiliation>
</author>
<author><name sortKey="Peiris, Sharika" sort="Peiris, Sharika" uniqKey="Peiris S" first="Sharika" last="Peiris">Sharika Peiris</name>
<affiliation><nlm:aff id="a1">Health Department, International Organization for Migration (IOM), Colombo, Sri Lanka</nlm:aff>
</affiliation>
</author>
<author><name sortKey="Agampodi, Suneth B" sort="Agampodi, Suneth B" uniqKey="Agampodi S" first="Suneth B" last="Agampodi">Suneth B. Agampodi</name>
<affiliation><nlm:aff id="a2">Department of Community Medicine, Faculty of Medicine and Allied Sciences, Rajarata University of Sri Lanka, Saliyapura, Sri Lanka</nlm:aff>
</affiliation>
<affiliation><nlm:aff id="a3">Tropical Disease Research Unit, Faculty of Medicine and Allied Sciences, Rajarata University of Sri Lanka, Saliyapura, Sri Lanka</nlm:aff>
</affiliation>
</author>
</analytic>
<series><title level="j">F1000Research</title>
<idno type="eISSN">2046-1402</idno>
<imprint><date when="2013">2013</date>
</imprint>
</series>
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<front><div type="abstract" xml:lang="en"><p>From September 2012 to July 2013, 81 laboratory-confirmed cases of infection with Middle East respiratory syndrome coronavirus (MERS-CoV), including 45 deaths (a case fatality ratio of 55%) have been reported from eight countries. Human-to-human transmission is now confirmed showing potential for another pandemic of zoonotic disease, with an extremely high mortality rate. Effective surveillance strategies are required in countries with a high influx of migrants from the Middle East to mitigate the probable importation of MERS-CoV. We discuss here the risk of MERS-CoV in major labor sending countries and list the probable strategies for control and prevention of MERS-CoV using Sri Lanka as an example. It is conservatively estimated that 10% of Sri Lanka’s population work as international labor migrants (1.8 to 2 million workers), with 93% residing in the Middle East. An average of 720 workers depart each day, with the majority of these workers (71%) departing to the Kingdom of Saudi Arabia (the country with 81.5% of total MERS-CoV cases). We also describe other inbound migration categories such as tourists and resident visa holders relevant to the context of preparedness and planning. The importance of partnerships between public health authorities at national and regional levels with labor migration networks to establish institutional and/or policy mechanisms are highlighted for ensuring effective preparedness and response planning. Strategies that can be taken by public health authorities working in both labor sending and labor receiving counties are also described. The strategies described here may be useful for other labor sending country contexts in Asia with a high frequency and volume of migrant workers to and from the Gulf region.</p>
</div>
</front>
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</TEI>
<pmc article-type="discussion"><pmc-dir>properties open_access</pmc-dir>
<front><journal-meta><journal-id journal-id-type="nlm-ta">F1000Res</journal-id>
<journal-id journal-id-type="iso-abbrev">F1000Res</journal-id>
<journal-id journal-id-type="pmc">F1000Research</journal-id>
<journal-title-group><journal-title>F1000Research</journal-title>
</journal-title-group>
<issn pub-type="epub">2046-1402</issn>
<publisher><publisher-name>F1000Research</publisher-name>
<publisher-loc>London, UK</publisher-loc>
</publisher>
</journal-meta>
<article-meta><article-id pub-id-type="pmid">24555078</article-id>
<article-id pub-id-type="pmc">3886786</article-id>
<article-id pub-id-type="doi">10.12688/f1000research.2-163.v1</article-id>
<article-categories><subj-group subj-group-type="heading"><subject>Commentary</subject>
</subj-group>
<subj-group><subject>Articles</subject>
<subj-group><subject>Global Health</subject>
</subj-group>
</subj-group>
</article-categories>
<title-group><article-title>“Don’t forget the migrants”: exploring preparedness and response strategies to combat the potential spread of MERS-CoV virus through migrant workers in Sri Lanka</article-title>
<fn-group content-type="pub-status"><fn><p>v1; ref status: indexed</p>
</fn>
</fn-group>
</title-group>
<contrib-group><contrib contrib-type="author" corresp="no"><name><surname>Wickramage</surname>
<given-names>Kolitha</given-names>
</name>
<xref ref-type="aff" rid="a1">1</xref>
</contrib>
<contrib contrib-type="author" corresp="no"><name><surname>Peiris</surname>
<given-names>Sharika</given-names>
</name>
<xref ref-type="aff" rid="a1">1</xref>
</contrib>
<contrib contrib-type="author"><name><surname>Agampodi</surname>
<given-names>Suneth B</given-names>
</name>
<xref ref-type="corresp" rid="c1">a</xref>
<xref ref-type="aff" rid="a2">2</xref>
<xref ref-type="aff" rid="a3">3</xref>
</contrib>
<aff id="a1"><label>1</label>
Health Department, International Organization for Migration (IOM), Colombo, Sri Lanka</aff>
<aff id="a2"><label>2</label>
Department of Community Medicine, Faculty of Medicine and Allied Sciences, Rajarata University of Sri Lanka, Saliyapura, Sri Lanka</aff>
<aff id="a3"><label>3</label>
Tropical Disease Research Unit, Faculty of Medicine and Allied Sciences, Rajarata University of Sri Lanka, Saliyapura, Sri Lanka</aff>
</contrib-group>
<author-notes><corresp id="c1"><label>a</label>
<email xlink:href="mailto:sunetagampodi@yahoo.com">sunetagampodi@yahoo.com</email>
</corresp>
<fn fn-type="con"><p>KW conceived the paper and drafted the first version of the manuscript. SP contributed in the concept and manuscript preparation. SBA revised and edited and finalized the manuscript for submission.</p>
</fn>
<fn fn-type="conflict"><p><bold>Competing interests: </bold>
No competing interests were disclosed.</p>
</fn>
</author-notes>
<pub-date pub-type="epub"><day>29</day>
<month>7</month>
<year>2013</year>
</pub-date>
<pub-date pub-type="collection"><year>2013</year>
</pub-date>
<volume>2</volume>
<elocation-id>163</elocation-id>
<history><date date-type="accepted"><day>25</day>
<month>7</month>
<year>2013</year>
</date>
</history>
<permissions><copyright-statement>Copyright: © 2013 Wickramage K et al.</copyright-statement>
<copyright-year>2013</copyright-year>
<license license-type="open-access" xlink:href="http://creativecommons.org/licenses/by/3.0/"><license-p>This is an open access article distributed under the terms of the Creative Commons Attribution Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.</license-p>
</license>
</permissions>
<self-uri content-type="pdf" xlink:type="simple" xlink:href="f1000research-2-1936.pdf"></self-uri>
<abstract><p>From September 2012 to July 2013, 81 laboratory-confirmed cases of infection with Middle East respiratory syndrome coronavirus (MERS-CoV), including 45 deaths (a case fatality ratio of 55%) have been reported from eight countries. Human-to-human transmission is now confirmed showing potential for another pandemic of zoonotic disease, with an extremely high mortality rate. Effective surveillance strategies are required in countries with a high influx of migrants from the Middle East to mitigate the probable importation of MERS-CoV. We discuss here the risk of MERS-CoV in major labor sending countries and list the probable strategies for control and prevention of MERS-CoV using Sri Lanka as an example. It is conservatively estimated that 10% of Sri Lanka’s population work as international labor migrants (1.8 to 2 million workers), with 93% residing in the Middle East. An average of 720 workers depart each day, with the majority of these workers (71%) departing to the Kingdom of Saudi Arabia (the country with 81.5% of total MERS-CoV cases). We also describe other inbound migration categories such as tourists and resident visa holders relevant to the context of preparedness and planning. The importance of partnerships between public health authorities at national and regional levels with labor migration networks to establish institutional and/or policy mechanisms are highlighted for ensuring effective preparedness and response planning. Strategies that can be taken by public health authorities working in both labor sending and labor receiving counties are also described. The strategies described here may be useful for other labor sending country contexts in Asia with a high frequency and volume of migrant workers to and from the Gulf region.</p>
</abstract>
<funding-group><funding-statement>The author(s) declared that no grants were involved in supporting this work.</funding-statement>
</funding-group>
</article-meta>
</front>
<body><sec><title>Introduction</title>
<p>The global health community is experiencing one of the deadliest coronavirus outbreaks that has been reported in recent times. The first case of Middle East respiratory syndrome coronavirus (MERS-CoV) infection was reported in September 2012 from the Kingdom of Saudi Arabia (KSA)
<sup><xref ref-type="bibr" rid="ref-1">1</xref>
</sup>
. Since then, 81 laboratory-confirmed cases of infection with 45 deaths were reported by eight countries, of which 66 (81.5%) were from the KSA
<sup><xref ref-type="bibr" rid="ref-2">2</xref>
</sup>
(
<xref ref-type="table" rid="T1">Table 1</xref>
). Even though France, Germany, Italy, Tunisia and the United Kingdom have also reported laboratory-confirmed cases, these patients had been either transferred to these countries from hospitals in the Middle East for specialist care or had returned from the Middle East and subsequently became ill. Hitherto, there have been no cases reported in Asia.</p>
<table-wrap id="T1" orientation="portrait" position="anchor"><label>Table 1. </label>
<caption><title>Middle East respiratory syndrome coronavirus – cases and deaths, April 2012 – 11th July 2013
<sup><xref ref-type="bibr" rid="ref-2">2</xref>
</sup>
.</title>
</caption>
<table frame="hsides" rules="groups" content-type="article-table"><thead><tr><th align="left" rowspan="1" colspan="1">Region and country</th>
<th align="left" rowspan="1" colspan="1">Cases</th>
<th align="left" rowspan="1" colspan="1">Deaths</th>
<th align="left" rowspan="1" colspan="1">Fatality (%)</th>
</tr>
</thead>
<tbody><tr><td rowspan="1" colspan="1"><bold><italic>Middle East</italic>
</bold>
</td>
<td rowspan="1" colspan="1"></td>
<td rowspan="1" colspan="1"></td>
<td rowspan="1" colspan="1"></td>
</tr>
<tr><td rowspan="1" colspan="1">Jordan</td>
<td rowspan="1" colspan="1">2</td>
<td rowspan="1" colspan="1">2</td>
<td rowspan="1" colspan="1">100</td>
</tr>
<tr><td rowspan="1" colspan="1">Qatar</td>
<td rowspan="1" colspan="1">2</td>
<td rowspan="1" colspan="1">0</td>
<td rowspan="1" colspan="1">0</td>
</tr>
<tr><td rowspan="1" colspan="1">Saudi Arabia</td>
<td rowspan="1" colspan="1">66</td>
<td rowspan="1" colspan="1">38</td>
<td rowspan="1" colspan="1">57</td>
</tr>
<tr><td rowspan="1" colspan="1">UAE</td>
<td rowspan="1" colspan="1">1</td>
<td rowspan="1" colspan="1">1</td>
<td rowspan="1" colspan="1">100</td>
</tr>
<tr><td rowspan="1" colspan="1"><bold><italic>North Africa</italic>
</bold>
</td>
<td rowspan="1" colspan="1"></td>
<td rowspan="1" colspan="1"></td>
<td rowspan="1" colspan="1"></td>
</tr>
<tr><td rowspan="1" colspan="1">Tunisia</td>
<td rowspan="1" colspan="1">2</td>
<td rowspan="1" colspan="1">1</td>
<td rowspan="1" colspan="1">50</td>
</tr>
<tr><td rowspan="1" colspan="1"><bold><italic>Europe</italic>
</bold>
</td>
<td rowspan="1" colspan="1"></td>
<td rowspan="1" colspan="1"></td>
<td rowspan="1" colspan="1"></td>
</tr>
<tr><td rowspan="1" colspan="1">UK</td>
<td rowspan="1" colspan="1">3</td>
<td rowspan="1" colspan="1">2</td>
<td rowspan="1" colspan="1">67</td>
</tr>
<tr><td rowspan="1" colspan="1">France</td>
<td rowspan="1" colspan="1">2</td>
<td rowspan="1" colspan="1">1</td>
<td rowspan="1" colspan="1">50</td>
</tr>
<tr><td rowspan="1" colspan="1">Italy</td>
<td rowspan="1" colspan="1">3</td>
<td rowspan="1" colspan="1">0</td>
<td rowspan="1" colspan="1">0</td>
</tr>
<tr><td rowspan="1" colspan="1"><bold><italic>Total</italic>
</bold>
</td>
<td rowspan="1" colspan="1"><bold><italic>81</italic>
</bold>
</td>
<td rowspan="1" colspan="1"><bold><italic>45</italic>
</bold>
</td>
<td rowspan="1" colspan="1"><bold><italic>59</italic>
</bold>
</td>
</tr>
</tbody>
</table>
</table-wrap>
<p>Coronaviruses have long been known to cause widespread human infections such as the common cold and global pandemics such as severe acute respiratory syndrome (SARS)
<sup><xref ref-type="bibr" rid="ref-3">3</xref>
</sup>
. MERS-CoV has not been identified previously among humans
<sup><xref ref-type="bibr" rid="ref-4">4</xref>
</sup>
, thus knowledge about the natural history of the disease is still limited. The clinical syndrome of MERS-CoV is primarily a respiratory disease including fever, cough and shortness of breath, resembling SARS. More than half of cases develop life threatening complications, such as respiratory failure
<sup><xref ref-type="bibr" rid="ref-5">5</xref>
,
<xref ref-type="bibr" rid="ref-6">6</xref>
</sup>
, acute respiratory distress syndrome (ARDS)
<sup><xref ref-type="bibr" rid="ref-6">6</xref>
–
<xref ref-type="bibr" rid="ref-8">8</xref>
</sup>
, renal failure
<sup><xref ref-type="bibr" rid="ref-4">4</xref>
–
<xref ref-type="bibr" rid="ref-6">6</xref>
,
<xref ref-type="bibr" rid="ref-8">8</xref>
</sup>
, and consumptive coagulopathy
<sup><xref ref-type="bibr" rid="ref-8">8</xref>
</sup>
. Studies of clusters of cases suggest that the spread may occur by both large and small aerosols and possibly via the faecal-oral route
<sup><xref ref-type="bibr" rid="ref-9">9</xref>
</sup>
. The pathogenesis of MERS-CoV is not fully understood. It appears to cause respiratory problems by attacking and infecting the cells in the nasopharynx; laboratory studies show that the virus has the ability to cause profound apoptosis of human bronchial epithelial cells
<sup><xref ref-type="bibr" rid="ref-10">10</xref>
</sup>
. All confirmed cases have had respiratory disease and most have developed pneumonia
<sup><xref ref-type="bibr" rid="ref-11">11</xref>
</sup>
. Complications during the course of illness have included severe pneumonia with respiratory failure requiring mechanical ventilations, ARDS with multi-organ failure, renal failure requiring dialysis, consumptive coagulopathy and pericarditis
<sup><xref ref-type="bibr" rid="ref-11">11</xref>
</sup>
. Hitherto, 45 out of 81 cases (55%) have died as a result of infection (
<xref ref-type="table" rid="T1">Table 1</xref>
). The rapid transmission and high attack rate in hospital settings have raised concerns about the risk of health care associated transmission of this virus
<sup><xref ref-type="bibr" rid="ref-12">12</xref>
</sup>
.</p>
<p>Although the transmission of the disease is still not as rapid as seen during the SARS epidemic in 2003
<sup><xref ref-type="bibr" rid="ref-13">13</xref>
</sup>
, human to human transmission of MRES-CoV has now been established
<sup><xref ref-type="bibr" rid="ref-5">5</xref>
</sup>
. Given the high case fatality rate compared to previous coronavirus pandemics, continued risk assessment, surveillance, and preparedness measures by all countries are required to minimize the impact of a probable global pandemic of MERS. The WHO encourages “all Member States to continue their surveillance for severe acute respiratory infections (SARI) and to carefully review any unusual pattern”
<sup><xref ref-type="bibr" rid="ref-2">2</xref>
</sup>
.</p>
<p>The annual Hajj pilgrimage, attended by 3 million pilgrims from all over the globe, has been identified as a potential threat for major spread
<sup><xref ref-type="bibr" rid="ref-14">14</xref>
</sup>
. A recent study has shown evidence of rapid acquisition of respiratory viruses among pilgrims during their stay during the Hajj in the KSA, most notably rhinovirus
<sup><xref ref-type="bibr" rid="ref-14">14</xref>
,
<xref ref-type="bibr" rid="ref-15">15</xref>
</sup>
. The authors highlight the potential of spreading these infections in the pilgrims' home countries upon their return. Memish and colleagues also suggest a ‘high degree of clinical vigilance’ required for the possibility of MERS-CoV infection in patients with respiratory infections who have visited the Middle East in the preceding 10 days
<sup><xref ref-type="bibr" rid="ref-6">6</xref>
</sup>
. Despite these concerns, the WHO does not recommend changing travel plans for Hajj or Umrah because of MERS-CoV. However, at a recent meeting organized by the WHO in Cairo (June, 2013), public health officials specifically emphasized the importance of preparedness and response at Hajj and contexts of mass gatherings ‘as a priority action’, with Member States of WHO agreeing to develop specific plans for MERS-CoV
<sup><xref ref-type="bibr" rid="ref-16">16</xref>
</sup>
. No emphasis at this meeting or in peer-reviewed literature has been made in relation to the large volumes and frequent travel patterns of international labor migrant workers to the Middle Eastern countries, especially from Asia
<sup><xref ref-type="bibr" rid="ref-17">17</xref>
</sup>
.</p>
</sec>
<sec><title>International labor migrants in the Middle Eastern region</title>
<p>Labor migration from Asia to the Middle East involves the movement of contractual workers from many ‘
<italic>labor sending</italic>
' nations such as the Philippines, India, Sri Lanka and Indonesia, to ‘
<italic>labor receiving</italic>
' ones, mainly within the Middle Eastern region
<sup><xref ref-type="bibr" rid="ref-18">18</xref>
</sup>
. Estimates of total migrant workers by the International Labor Organization for 2010 were 105.5 million, 30 million of which were from within Asia
<sup><xref ref-type="bibr" rid="ref-19">19</xref>
</sup>
. It is estimated that there is a net annual outflow of two million migrant workers from the ‘top five’ South Asian labor sending countries of Sri Lanka, India, Bangladesh, Nepal and Pakistan
<sup><xref ref-type="bibr" rid="ref-20">20</xref>
</sup>
(
<xref ref-type="table" rid="T2">Table 2</xref>
). Unregistered ‘irregular’ migrant workers also contribute to this outflow of contractual workers from Asia, although estimates are difficult to assess due to the clandestine nature of their travel. It is important to highlight that remittance from labor migrants contribute significantly to the economic growth of most developing countries in Asia. The Sri Lankan economy is highly dependent on foreign exchange earnings from its migrant workforce, with remittance from workers in Middle Eastern countries alone contributing 58.9% of all total foreign exchange earned in 2011
<sup><xref ref-type="bibr" rid="ref-21">21</xref>
</sup>
.</p>
<table-wrap id="T2" orientation="portrait" position="anchor"><label>Table 2. </label>
<caption><title>Outflow of workers from selected Asian countries to the Gulf Cooperation council countries in 2010
<sup><xref ref-type="bibr" rid="ref-26">26</xref>
</sup>
.</title>
</caption>
<table frame="hsides" rules="groups" content-type="article-table"><thead><tr><th rowspan="1" colspan="1"></th>
<th align="center" colspan="7" rowspan="1">Labor receiving country</th>
</tr>
<tr><th align="left" rowspan="1" colspan="1">Labor sending country</th>
<th align="left" rowspan="1" colspan="1">Bahrain</th>
<th align="left" rowspan="1" colspan="1">Kuwait</th>
<th align="left" rowspan="1" colspan="1">Oman</th>
<th align="left" rowspan="1" colspan="1">Qatar</th>
<th align="left" rowspan="1" colspan="1">KSA</th>
<th align="left" rowspan="1" colspan="1">UAE</th>
<th align="left" rowspan="1" colspan="1">Total</th>
</tr>
</thead>
<tbody><tr><td rowspan="1" colspan="1"><bold>Bangladesh</bold>
</td>
<td rowspan="1" colspan="1">13,996</td>
<td rowspan="1" colspan="1">29</td>
<td rowspan="1" colspan="1">135,265</td>
<td rowspan="1" colspan="1">13,111</td>
<td rowspan="1" colspan="1">15,039</td>
<td rowspan="1" colspan="1">282,739</td>
<td rowspan="1" colspan="1"><italic>460,179</italic>
</td>
</tr>
<tr><td rowspan="1" colspan="1"><bold>India</bold>
</td>
<td rowspan="1" colspan="1">14,323</td>
<td rowspan="1" colspan="1">45,149</td>
<td rowspan="1" colspan="1">73,819</td>
<td rowspan="1" colspan="1">41,710</td>
<td rowspan="1" colspan="1">289,297</td>
<td rowspan="1" colspan="1">138,861</td>
<td rowspan="1" colspan="1"><italic>603,159</italic>
</td>
</tr>
<tr><td rowspan="1" colspan="1"><bold>Nepal</bold>
</td>
<td rowspan="1" colspan="1">4,647</td>
<td rowspan="1" colspan="1">15,187</td>
<td rowspan="1" colspan="1">2,442</td>
<td rowspan="1" colspan="1">102,966</td>
<td rowspan="1" colspan="1">71,116</td>
<td rowspan="1" colspan="1">44,464</td>
<td rowspan="1" colspan="1"><italic>240,822</italic>
</td>
</tr>
<tr><td rowspan="1" colspan="1"><bold>Pakistan</bold>
</td>
<td rowspan="1" colspan="1">5,940</td>
<td rowspan="1" colspan="1">6,251</td>
<td rowspan="1" colspan="1">37,580</td>
<td rowspan="1" colspan="1">10,171</td>
<td rowspan="1" colspan="1">138,495</td>
<td rowspan="1" colspan="1">222,097</td>
<td rowspan="1" colspan="1"><italic>420,534</italic>
</td>
</tr>
<tr><td rowspan="1" colspan="1"><bold>Sri Lanka</bold>
</td>
<td rowspan="1" colspan="1">7,057</td>
<td rowspan="1" colspan="1">48,105</td>
<td rowspan="1" colspan="1">6,370</td>
<td rowspan="1" colspan="1">53,632</td>
<td rowspan="1" colspan="1">70,896</td>
<td rowspan="1" colspan="1">42,198</td>
<td rowspan="1" colspan="1"><italic>228,258</italic>
</td>
</tr>
<tr><td rowspan="1" colspan="1"><bold>Philippines</bold>
</td>
<td rowspan="1" colspan="1">15,434</td>
<td rowspan="1" colspan="1">53,010</td>
<td rowspan="1" colspan="1">10,955</td>
<td rowspan="1" colspan="1">87,813</td>
<td rowspan="1" colspan="1">293,049</td>
<td rowspan="1" colspan="1">201,214</td>
<td rowspan="1" colspan="1"><italic>661,475</italic>
</td>
</tr>
<tr><td rowspan="1" colspan="1"><bold>Indonesia</bold>
</td>
<td rowspan="1" colspan="1">15,434</td>
<td rowspan="1" colspan="1">45,149</td>
<td rowspan="1" colspan="1">73,819</td>
<td rowspan="1" colspan="1">41,710</td>
<td rowspan="1" colspan="1">289,297</td>
<td rowspan="1" colspan="1">138,861</td>
<td rowspan="1" colspan="1"><italic>603,159</italic>
</td>
</tr>
<tr><td rowspan="1" colspan="1"><bold><italic>Total</italic>
</bold>
</td>
<td rowspan="1" colspan="1"><italic>75,720</italic>
</td>
<td rowspan="1" colspan="1"><italic>212,880</italic>
</td>
<td rowspan="1" colspan="1"><italic>340,250</italic>
</td>
<td rowspan="1" colspan="1"><italic>351,113</italic>
</td>
<td rowspan="1" colspan="1"><italic>1,167,189</italic>
</td>
<td rowspan="1" colspan="1"><italic>1,070,434</italic>
</td>
<td rowspan="1" colspan="1"></td>
</tr>
</tbody>
</table>
</table-wrap>
</sec>
<sec><title>Preparedness measures and screening strategies relevant to Sri Lanka</title>
<p>Although the WHO has not yet issued a travel health warning for any country, nor recommended conducting on-arrival screenings at ports of entry, the infectious nature of MERS-CoV means that there is a risk of contracting the disease through infected individuals who have visited the Middle East in the preceding 10 to 14 days. Health authorities in some countries in the region have already begun making advanced arrangements for the diagnostic test kits developed by the CDC for MERS-CoV to be made available to National Reference Laboratories
<sup><xref ref-type="bibr" rid="ref-16">16</xref>
</sup>
. Ensuring guidance for health care professionals regarding case definition, diagnosis and management for MERS-CoV infection, and establishing an active surveillance system for ‘influenza-like’ illnesses in hospitals are essential steps for surveillance. Elaborating pandemic preparedness and response measures are not the focus of this current paper since these have already been well described and indeed established in Sri Lanka through previous efforts against SARS and H1N1
<sup><xref ref-type="bibr" rid="ref-22">22</xref>
</sup>
. Rather, this article will focus on understanding the importance of the large volumes of migration categories and their dynamics, which may yield more specific and targeted public health and screening interventions for MERS-CoV.</p>
</sec>
<sec><title>Inbound migration categories to Sri Lanka from the Middle East region</title>
<p>Inbound migration refers to the flow of persons traveling into a country
<sup><xref ref-type="bibr" rid="ref-23">23</xref>
</sup>
. We identify five major inbound migrant flows from the Middle East to Sri Lanka with the potential of introducing MERS-CoV (
<xref ref-type="fig" rid="f1">Figure 1</xref>
).</p>
<fig fig-type="figure" id="f1" orientation="portrait" position="float"><label>Figure 1. </label>
<caption><title>Categories of inbound travelers from the Middle East.</title>
<p>This figure shows the different categories of inbound travelers arriving at the Bandaranaike International Airport, Sri Lanka.</p>
</caption>
<graphic xlink:href="f1000research-2-1936-g0000"></graphic>
</fig>
<p>KSA, Qatar, Kuwait, UAE and Jordan are the major destination (labor receiving) countries, encompassing 85% of Sri Lanka’s total international labor migrant force (1.8 to 2 million workers in 2011)
<sup><xref ref-type="bibr" rid="ref-21">21</xref>
</sup>
. Each day, around 720 migrant workers leave Sri Lanka to the Middle East as labor migrants through Bandaranaike International airport
<sup><xref ref-type="bibr" rid="ref-24">24</xref>
</sup>
. Over 93% of the 262,960 labor migrants were employed in Middle Eastern countries in the year 2011 (
<xref ref-type="table" rid="T2">Table 2</xref>
). Female participation in foreign employment is 48.3% of the total departures during the same year, and 85% of them worked as domestic housemaid
<sup><xref ref-type="bibr" rid="ref-25">25</xref>
</sup>
. The recent evidence of virus spreading within family clusters may be a significant factor in determining household transmission
<sup><xref ref-type="bibr" rid="ref-6">6</xref>
</sup>
.</p>
<p>Data on patterns of returning migrant workers are not available since there is no registry of returning workers. However, inflow is expected to be greater than outflow considering both the cyclical nature of labor migration (where a worker usually returns to the country for a short period before departing again - a cycle which can last 10 years or more), and the large stock total of formally registered workers from Sri Lanka.</p>
<p>Every year, Muslims from all over the world converge in KSA to take part in the annual Hajj (pilgrimage). KSA hosted 2.5 million pilgrims in 2009 amidst the H1N1 pandemic
<sup><xref ref-type="bibr" rid="ref-27">27</xref>
</sup>
. In 2013, the Hajj is expected to fall between the 13–18 October. A quota system operates to limit the number of people from each country visiting Mecca each year based on the number of Muslims in each country. The Sri Lankan quota for 2013 is currently set at 2,800
<sup><xref ref-type="bibr" rid="ref-28">28</xref>
</sup>
.</p>
<sec><title>Tourist arrivals and resident visa holders</title>
<p>A residence visa is a permit for non-Sri Lankan citizens to obtain residence facilities for purposes of long stays, work and study. The numbers of both residency visa holders and tourists visiting Sri Lanka from the Middle East, disaggregated by country of residence, are shown in
<xref ref-type="table" rid="T3">Table 3</xref>
. Both KSA and the UAE remain the primary source countries of migrants within this inbound category.</p>
<table-wrap id="T3" orientation="portrait" position="anchor"><label>Table 3. </label>
<caption><title>Resident visa holders and tourist arrivals from the Middle East in 2010 and 2011.</title>
</caption>
<table frame="hsides" rules="groups" content-type="article-table"><thead><tr><th rowspan="1" colspan="1"></th>
<th align="center" colspan="2" rowspan="1">2010</th>
<th align="center" colspan="2" rowspan="1">2011</th>
</tr>
<tr><th align="left" rowspan="1" colspan="1">Country</th>
<th align="left" rowspan="1" colspan="1">Tourists</th>
<th align="left" rowspan="1" colspan="1">Residents</th>
<th align="left" rowspan="1" colspan="1">Tourists</th>
<th align="left" rowspan="1" colspan="1">Residents</th>
</tr>
</thead>
<tbody><tr><td rowspan="1" colspan="1">Bahrain</td>
<td rowspan="1" colspan="1">1,459</td>
<td rowspan="1" colspan="1">3</td>
<td rowspan="1" colspan="1">1,819</td>
<td rowspan="1" colspan="1">2</td>
</tr>
<tr><td rowspan="1" colspan="1">Iran</td>
<td rowspan="1" colspan="1">1,900</td>
<td rowspan="1" colspan="1">75</td>
<td rowspan="1" colspan="1">2,223</td>
<td rowspan="1" colspan="1">139</td>
</tr>
<tr><td rowspan="1" colspan="1">Israel</td>
<td rowspan="1" colspan="1">3,919</td>
<td rowspan="1" colspan="1">18</td>
<td rowspan="1" colspan="1">6,164</td>
<td rowspan="1" colspan="1">15</td>
</tr>
<tr><td rowspan="1" colspan="1">Jordan</td>
<td rowspan="1" colspan="1">1,708</td>
<td rowspan="1" colspan="1">41</td>
<td rowspan="1" colspan="1">1,478</td>
<td rowspan="1" colspan="1">52</td>
</tr>
<tr><td rowspan="1" colspan="1">Kuwait</td>
<td rowspan="1" colspan="1">2,303</td>
<td rowspan="1" colspan="1">25</td>
<td rowspan="1" colspan="1">2,812</td>
<td rowspan="1" colspan="1">15</td>
</tr>
<tr><td rowspan="1" colspan="1">Lebanon</td>
<td rowspan="1" colspan="1">1,816</td>
<td rowspan="1" colspan="1">11</td>
<td rowspan="1" colspan="1">1,960</td>
<td rowspan="1" colspan="1">21</td>
</tr>
<tr><td rowspan="1" colspan="1">Oman</td>
<td rowspan="1" colspan="1">1,359</td>
<td rowspan="1" colspan="1">26</td>
<td rowspan="1" colspan="1">2,177</td>
<td rowspan="1" colspan="1">19</td>
</tr>
<tr><td rowspan="1" colspan="1">KSA</td>
<td rowspan="1" colspan="1">9,301</td>
<td rowspan="1" colspan="1">20</td>
<td rowspan="1" colspan="1">15,081</td>
<td rowspan="1" colspan="1">51</td>
</tr>
<tr><td rowspan="1" colspan="1">Qatar</td>
<td rowspan="1" colspan="1">1,574</td>
<td rowspan="1" colspan="1">8</td>
<td rowspan="1" colspan="1">2,788</td>
<td rowspan="1" colspan="1">12</td>
</tr>
<tr><td rowspan="1" colspan="1">UAE</td>
<td rowspan="1" colspan="1">9,825</td>
<td rowspan="1" colspan="1">18</td>
<td rowspan="1" colspan="1">17,664</td>
<td rowspan="1" colspan="1">18</td>
</tr>
<tr><td rowspan="1" colspan="1">Egypt</td>
<td rowspan="1" colspan="1">849</td>
<td rowspan="1" colspan="1">62</td>
<td rowspan="1" colspan="1">767</td>
<td rowspan="1" colspan="1">77</td>
</tr>
<tr><td rowspan="1" colspan="1">Turkey</td>
<td rowspan="1" colspan="1">664</td>
<td rowspan="1" colspan="1">41</td>
<td rowspan="1" colspan="1">1,171</td>
<td rowspan="1" colspan="1">86</td>
</tr>
<tr><td rowspan="1" colspan="1">Others*</td>
<td rowspan="1" colspan="1">863</td>
<td rowspan="1" colspan="1"></td>
<td rowspan="1" colspan="1">1,397</td>
<td rowspan="1" colspan="1">93</td>
</tr>
<tr><td rowspan="1" colspan="1"><bold>Middle East (Total)</bold>
</td>
<td rowspan="1" colspan="1"><bold><italic>37,540</italic>
</bold>
</td>
<td rowspan="1" colspan="1"><bold><italic>441</italic>
</bold>
</td>
<td rowspan="1" colspan="1"><bold><italic>57,501</italic>
</bold>
</td>
<td rowspan="1" colspan="1"><bold><italic>600</italic>
</bold>
</td>
</tr>
</tbody>
</table>
<table-wrap-foot><fn><p><italic>*Others: Yemen, Cyprus, Iraq, Palestine and Syria.</italic>
</p>
</fn>
</table-wrap-foot>
</table-wrap>
<p>If a highly conservative estimate on the number of labor migrants returning from the Middle East is placed at 220,000 persons per year, then based on data from the five major categories of migrant flows presented here, an estimated 280,901 persons will travel from the Middle East to Sri Lanka. This number does not account for the number of returning Sri Lankan tourists and irregular migrants from the Middle Eastern region. Based on the fact that 71% of the current caseload of Sri Lankan migrant workers depart for the KSA, it is expected that the majority of inbound migrants will be traveling from the same country.</p>
</sec>
</sec>
<sec><title>Preparedness and response strategies for labor migrants</title>
<p>It is important to note that the following recommendations are suggested as a way of enhancing, not substituting, existing frameworks on pandemic disaster preparedness and response. There are currently no established guidelines for MERS-CoV established at country level, unlike in other settings
<sup><xref ref-type="bibr" rid="ref-29">29</xref>
</sup>
.</p>
<p>A number of prevention and screening strategies for migrant workers are presented here, classified according to the three phases of migration: ‘pre-departure’ (departing Sri Lanka), ‘at destination’ (time spent in the Gulf States) and ‘upon-arrival’ (arrival back in Sri Lanka). Each stage in the migration cycle offers unique opportunities for public health action/intervention based on enabling mechanisms and capacities harnessed in routine migrant worker pathways (
<xref ref-type="fig" rid="f2">Figure 2</xref>
). These may be useful in refining into other country contexts.</p>
<fig fig-type="figure" id="f2" orientation="portrait" position="float"><label>Figure 2. </label>
<caption><title>Identifying the ‘intervention space’ within phases of the labor migration cycle.</title>
<p>Potential places for interventions (intervention space) in relation to labor migration.</p>
</caption>
<graphic xlink:href="f1000research-2-1936-g0001"></graphic>
</fig>
<p><bold>A. Strategies at the 'pre-departure’ phase.</bold>
The majority of labor receiving countries require pre-departure health assessment as a pre-requisite for a work visa. Migrant workers to Gulf State countries are expected to undertake a mandatory pre-departure medical examination in Sri Lanka to ensure their ‘fitness to travel’ and fulfillment of health assessment criteria set by the recipient country. Health care workers could provide health information on MERS-CoV to potential migrant workers during the medical examination. The Gulf-Approved Medical Centers Association (GAMCA) has a network of 13 private medical centers in Sri Lanka, which are accredited to conduct health assessments of Sri Lankan migrant workers prior to departure to the GAMCA countries KSA, Kuwait, Bahrain, Qatar, UAE and Oman. As a preparedness measure, medical staff at these health assessment centers can be trained with up-to date information on MERS-CoV and be encouraged to disseminate language specific information-exchange communication (IEC) materials on signs, symptoms and preventative actions for the migrant worker
<sup><xref ref-type="bibr" rid="ref-30">30</xref>
</sup>
.</p>
<p><bold>B. Strategies at the ‘destination’ phase.</bold>
Sri Lankan embassies and diplomatic missions at destination countries could disseminate public health service messages in relation to MERS-CoV in Singhalese/Tamil languages via embassy welfare programs, social networks and through ethno-specific radio programs. It is vital that local health authorities and employers provide access for migrant workers to seek primary health care and that they are supported with specialized/referral care within the health system in the Gulf States. The importance of health accessibility, irrespective of visa status, for migrant workers to primary and specialized health care facilities in these destination countries also needs to be emphasized through state-to-state and regional advocacy mechanisms. It is recommended that public health authorities and global bodies such as the WHO and the International Organization for Migration utilize the support of existing inter-regional and trans-national migrant worker networks such as the members of the ‘Colombo process’ and ‘Abu-Dhabi process’ in order to promote effective public health messages and strategies
<sup><xref ref-type="bibr" rid="ref-31">31</xref>
</sup>
.</p>
<p><bold>C. Strategies at the ‘on-arrival’ phase.</bold>
The Sri Lanka Bureau of Foreign Employment (SLFBE) which provides policy direction and regulation of labor migrants has a dedicated 24-hour administrative desk at Sri Lanka’s Bandaranaike International Airport, to manage grievances from returning migrant workers. A worker welfare center to house migrant workers in need of support managed by the SLFBE is also available near the airport. Currently there are no medical personnel attached to the SLFBE services for on-arrival phase. It is recommended that the Ministry of Health make arrangements to establish a coordination mechanism with the SLFBE and with airport health authorities, which currently have no linkage to migrant worker programs. A rotating roster of trained health professionals allocated at the health center at the airport could ensure each returning worker completes the rapid symptom checklist (see assessment algorithm in
<xref ref-type="fig" rid="f3">Figure 3</xref>
). The algorithm was developed after augmenting the guidance frameworks for MERS-CoV created by the public health authorities in Canada
<sup><xref ref-type="bibr" rid="ref-29">29</xref>
</sup>
and the CDC
<sup><xref ref-type="bibr" rid="ref-32">32</xref>
</sup>
. It is important for port health authorities to also build effective partnerships and protocols with immigration control officers at ‘on arrival counters’. This will ensure referral of travelers returning from the Middle East where cases of MERS-CoV have been reported to the health screening desk. Leaflets advising travelers of symptoms of the influenza-like illness could also be distributed at the immigration counter to arriving passengers.</p>
<fig fig-type="figure" id="f3" orientation="portrait" position="float"><label>Figure 3. </label>
<caption><title>Potential screening algorithm for Middle East respiratory syndrome (MERS-CoV) at Bandaranaike International airport.</title>
<p><sup>1</sup>
Immigration Counter Referral for those migrant workers returning from Arabian peninsula and neighboring Middle East countries (Saudi Arabia, Qatar, Jordan, United Arab Emirates, Bahrain, Iran, Iraq, Israel, Kuwait, Lebanon, Oman, Palestinian Territories, Yemen, Syria). Referral to Airport health unit may also be directed from the SLFBE migrant worker arrival desk.</p>
<p><sup>2</sup>
Acute Respiratory Infection (ARI): Any new onset acute respiratory infection that could potentially be spread by the droplet route (either upper or lower respiratory tract), which presents with symptoms of a new or worsening cough or shortness of breath and often fever (>38°Celsius).</p>
<p><sup>3</sup>
This token will identify the migrant worker as a susceptible person for MERS-CoV.</p>
</caption>
<graphic xlink:href="f1000research-2-1936-g0002"></graphic>
</fig>
<p>Managing risk communication also forms a vital strategy for any form of public health preparedness and response. Studies have shown that when responding to a novel infectious disease outbreak, policy and planning decisions can limit the ability to control the outbreak and result in unintended consequences including lack of public confidence
<sup><xref ref-type="bibr" rid="ref-33">33</xref>
</sup>
. Communication of risk to target populations needs to be carefully planned to avert maladaptive behaviors due to fear and defensive avoidance (the motivated resistance to the message, such as denial or minimization of the threat
<sup><xref ref-type="bibr" rid="ref-34">34</xref>
</sup>
). Individuals may defensively avoid a message by being inattentive to the communication (e.g., looking away from the message), or by suppressing any thoughts about the threat over the long term. Mitigating such threats through targeted communication strategies to migrant workers and other categories such as those described above may be useful
<sup><xref ref-type="bibr" rid="ref-35">35</xref>
</sup>
. The strategies outlined above do not warrant large scale ‘national level’ awareness campaigns, which may exacerbate anxiety and induce maladaptive rather than positive health seeking behaviors
<sup><xref ref-type="bibr" rid="ref-36">36</xref>
</sup>
.</p>
</sec>
<sec sec-type="conclusions"><title>Conclusion</title>
<p>It has been one year since MERS-CoV was discovered, yet many questions remain unanswered about its pathogenesis, host reservoirs and transmission dynamics. What is clear from global health authorities is that countries need to plan for preparedness and response planning
<sup><xref ref-type="bibr" rid="ref-29">29</xref>
</sup>
. We recommend partnerships between public health authorities, at national and regional levels, with the labor migration industry and migrant worker networks in establishing both institutional and policy mechanisms to ensure effective preparedness and response planning in response to a potential MERS-COV threat through labor migrants from South Asia.</p>
</sec>
</body>
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<contrib-group><contrib contrib-type="author"><name><surname>van Kerkhove</surname>
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<aff id="r2374a1"><label>1</label>
Faculty of Medicine, School of Public Health, Imperial College London, London, UK</aff>
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<author-notes><fn fn-type="conflict"><p><bold>Competing interests: </bold>
No competing interests were disclosed.</p>
</fn>
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<pub-date pub-type="epub"><day>11</day>
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<year>2013</year>
</pub-date>
<related-article id="d35e2082" related-article-type="peer-reviewed-article" ext-link-type="doi" xlink:href="10.12688/f1000research.2-163.v1">Version 1</related-article>
<custom-meta-group><custom-meta><meta-name>recommendation</meta-name>
<meta-value>approve</meta-value>
</custom-meta>
</custom-meta-group>
</front-stub>
<body><p>I only have one major edit that I would recomend for this article; Table 1 is not necessary and can be removed.</p>
<p>I have read this submission. I believe that I have an appropriate level of expertise to confirm that it is of an acceptable scientific standard.</p>
</body>
</sub-article>
<sub-article id="report1250" article-type="peer-review"><front-stub><title-group><article-title>Referee response for version 1</article-title>
</title-group>
<contrib-group><contrib contrib-type="author"><name><surname>Gericke</surname>
<given-names>Christian</given-names>
</name>
<xref ref-type="aff" rid="r1250a1">1</xref>
<role>Referee</role>
</contrib>
<aff id="r1250a1"><label>1</label>
Wesley Research Institute, Brisbane, Austria</aff>
</contrib-group>
<author-notes><fn fn-type="conflict"><p><bold>Competing interests: </bold>
No competing interests were disclosed.</p>
</fn>
</author-notes>
<pub-date pub-type="epub"><day>19</day>
<month>8</month>
<year>2013</year>
</pub-date>
<related-article id="d35e2128" related-article-type="peer-reviewed-article" ext-link-type="doi" xlink:href="10.12688/f1000research.2-163.v1">Version 1</related-article>
<custom-meta-group><custom-meta><meta-name>recommendation</meta-name>
<meta-value>approve</meta-value>
</custom-meta>
</custom-meta-group>
</front-stub>
<body><p>Well written paper the spreading potential of MERS-CoV through migration in Sri Lanka.</p>
<p>I have read this submission. I believe that I have an appropriate level of expertise to confirm that it is of an acceptable scientific standard.</p>
</body>
</sub-article>
<sub-article id="report1251" article-type="peer-review"><front-stub><title-group><article-title>Referee response for version 1</article-title>
</title-group>
<contrib-group><contrib contrib-type="author"><name><surname>Modjarrad</surname>
<given-names>Kayvon</given-names>
</name>
<xref ref-type="aff" rid="r1251a1">1</xref>
<role>Referee</role>
</contrib>
<aff id="r1251a1"><label>1</label>
National Institute of Allergy and Infectious Diseases, NIH, Bethesda MD, USA</aff>
</contrib-group>
<author-notes><fn fn-type="conflict"><p><bold>Competing interests: </bold>
No competing interests were disclosed.</p>
</fn>
</author-notes>
<pub-date pub-type="epub"><day>6</day>
<month>8</month>
<year>2013</year>
</pub-date>
<related-article id="d35e2174" related-article-type="peer-reviewed-article" ext-link-type="doi" xlink:href="10.12688/f1000research.2-163.v1">Version 1</related-article>
<custom-meta-group><custom-meta><meta-name>recommendation</meta-name>
<meta-value>approve-with-reservations</meta-value>
</custom-meta>
</custom-meta-group>
</front-stub>
<body><p>The current manuscript, submitted by Wickramage
<italic>et al</italic>
., comments on the potentially important role migrant workers may play in the evolving MERS-CoV epidemic. The authors focus most of their discussion on laborers traveling between Sri Lanka and countries bordering the Persian Gulf where most MERS cases have been identified. The authors raise a couple of important concerns: 1) Migrant laborers could serve as a major vehicle for the international spread of the MERS coronavirus; 2) MERS-specific surveillance strategies are needed, particularly for Southeast Asian countries that receive large numbers of returning laborers from the Middle East. </p>
<p> These points can be presented, however, with much greater clarity and brevity. The authors occasionally use hyperbole and repetition to make misleading assertions. For example, "the extremely high" mortality rate they cite has been falling as more cases are identified and will likely continue along this trend as milder cases are discovered. Claims of "rapid transmission" and a "high attack rate" are made without any epidemiologic basis or support from literature. Throughout the commentary, the authors also make redundant, disorganized, and extra-contextual statements about MERS clinical features, labor sending/receiving nations, the Hajj pilgrimage, and strategies for controlling a potential MERS epidemic. The only way this manuscript can be salvaged is if it is refashioned as a brief communication of no more than a few hundred words with one figure or table. The manuscript should be narrowly focused on migrant workers between Gulf States and Southeast Asia and the threat they may pose to the spread of the virus. The additional commentary on screening and surveillance adds nothing to the existing WHO report and essentially boils down to education, awareness, and appropriate referral. The following are specific points of concern:
<list list-type="bullet"><list-item><p>Instead of presenting the number of cases and deaths in each country in tabular format, the authors should provide a link to WHO’s running tally as the authors numbers will be (as they are now) inaccurate and out-of-date. </p>
</list-item>
<list-item><p> Remove alarmist statements such as “extremely high mortality rate”, “deadliest coronavirus outbreaks” and platitudes such as “the infectious nature of MERS-CoV means that there is a risk of contracting the disease through infected individuals”</p>
<p>. </p>
</list-item>
<list-item><p>I’m confused by the last sentence of the introduction’s first paragraph: “there have been no cases reported in Asia.” </p>
</list-item>
<list-item><p>The second paragraph of the introduction repeats the clinical features of MERS. This should be corrected. </p>
</list-item>
<list-item><p>The Hajj pilgrimage is discussed briefly in the introduction, dropped, and then brought up again without any context later in the manuscript. The same is true regarding labor migration patterns and surveillance strategies. There is no real coherent flow to any of these topics.</p>
</list-item>
<list-item><p>Figure 1 and 2 - no information to what is stated in the text. </p>
</list-item>
<list-item><p>The terms created for the different phases of labor migration cycle make no sense. To the best of my understanding, “pre-departure” means departure and “upon-arrival” means return. These terms are superfluous and are more jargon than they are informative. </p>
</list-item>
<list-item><p> Figure 3 is unclear. Is this for anybody returning from a Gulf State or only those returning with symptoms? The first diamond makes this unclear.</p>
</list-item>
</list>
</p>
<p>I have read this submission. I believe that I have an appropriate level of expertise to confirm that it is of an acceptable scientific standard, however I have significant reservations, as outlined above.</p>
</body>
</sub-article>
</pmc>
</record>
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