SrasV1, Main, Exploration, bibRecord, 000832

Clinical characteristics and intrauterine vertical transmission potential of COVID-19 infection in nine pregnant women: a retrospective review of medical records

Identifieur interne : 000832 ( Main/Exploration ); précédent : 000831; suivant : 000833

Clinical characteristics and intrauterine vertical transmission potential of COVID-19 infection in nine pregnant women: a retrospective review of medical records

Source :

Lancet (London, England) [ 0140-6736 ] ; 2020.

RBID : PMC:7159281

Descripteurs français

English descriptors

KwdEn :
- Betacoronavirus (isolation & purification), Betacoronavirus (pathogenicity), Cesarean Section, Coronavirus Infections (complications), Coronavirus Infections (transmission), Cough (etiology), Dyspepsia (etiology), Female, Fever (etiology), Humans, Infant, Newborn, Infectious Disease Transmission, Vertical, Myalgia (etiology), Pharyngitis (etiology), Pneumonia, Viral (complications), Pneumonia, Viral (diagnosis), Pneumonia, Viral (transmission), Pregnancy, Pregnancy Complications, Infectious (diagnosis), Pregnancy Outcome, Pregnancy Trimester, Third, Retrospective Studies.
MESH :
- complications : Coronavirus Infections, Pneumonia, Viral.
- diagnosis : Pneumonia, Viral, Pregnancy Complications, Infectious.
- etiology : Cough, Dyspepsia, Fever, Myalgia, Pharyngitis.
- isolation & purification : Betacoronavirus.
- pathogenicity : Betacoronavirus.
- transmission : Coronavirus Infections, Pneumonia, Viral.
- Cesarean Section, Female, Humans, Infant, Newborn, Infectious Disease Transmission, Vertical, Pregnancy, Pregnancy Outcome, Pregnancy Trimester, Third, Retrospective Studies.

Abstract

SummaryBackground

Previous studies on the pneumonia outbreak caused by the 2019 novel coronavirus disease (COVID-19) were based on information from the general population. Limited data are available for pregnant women with COVID-19 pneumonia. This study aimed to evaluate the clinical characteristics of COVID-19 in pregnancy and the intrauterine vertical transmission potential of COVID-19 infection.

Methods

Clinical records, laboratory results, and chest CT scans were retrospectively reviewed for nine pregnant women with laboratory-confirmed COVID-19 pneumonia (ie, with maternal throat swab samples that were positive for severe acute respiratory syndrome coronavirus 2 [SARS-CoV-2]) who were admitted to Zhongnan Hospital of Wuhan University, Wuhan, China, from Jan 20 to Jan 31, 2020. Evidence of intrauterine vertical transmission was assessed by testing for the presence of SARS-CoV-2 in amniotic fluid, cord blood, and neonatal throat swab samples. Breastmilk samples were also collected and tested from patients after the first lactation.

Findings

All nine patients had a caesarean section in their third trimester. Seven patients presented with a fever. Other symptoms, including cough (in four of nine patients), myalgia (in three), sore throat (in two), and malaise (in two), were also observed. Fetal distress was monitored in two cases. Five of nine patients had lymphopenia (<1·0 × 10⁹ cells per L). Three patients had increased aminotransferase concentrations. None of the patients developed severe COVID-19 pneumonia or died, as of Feb 4, 2020. Nine livebirths were recorded. No neonatal asphyxia was observed in newborn babies. All nine livebirths had a 1-min Apgar score of 8–9 and a 5-min Apgar score of 9–10. Amniotic fluid, cord blood, neonatal throat swab, and breastmilk samples from six patients were tested for SARS-CoV-2, and all samples tested negative for the virus.

Interpretation

The clinical characteristics of COVID-19 pneumonia in pregnant women were similar to those reported for non-pregnant adult patients who developed COVID-19 pneumonia. Findings from this small group of cases suggest that there is currently no evidence for intrauterine infection caused by vertical transmission in women who develop COVID-19 pneumonia in late pregnancy.

Funding

Hubei Science and Technology Plan, Wuhan University Medical Development Plan.

Url:

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7159281

DOI: 10.1016/S0140-6736(20)30360-3
PubMed: 32151335
PubMed Central: 7159281

Affiliations:

Le document en format XML

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<author><name sortKey="Guo, Juanjuan" sort="Guo, Juanjuan" uniqKey="Guo J" first="Juanjuan" last="Guo">Juanjuan Guo</name>
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<wicri:regionArea>Department of Gynaecology and Obstetrics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei</wicri:regionArea>
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<author><name sortKey="Wang, Chen" sort="Wang, Chen" uniqKey="Wang C" first="Chen" last="Wang">Chen Wang</name>
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<author><name sortKey="Luo, Fan" sort="Luo, Fan" uniqKey="Luo F" first="Fan" last="Luo">Fan Luo</name>
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<author><name sortKey="Yu, Xuechen" sort="Yu, Xuechen" uniqKey="Yu X" first="Xuechen" last="Yu">Xuechen Yu</name>
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<country xml:lang="fr">République populaire de Chine</country>
<wicri:regionArea>Department of Gynaecology and Obstetrics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei</wicri:regionArea>
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<affiliation wicri:level="1"><nlm:aff id="aff3">Clinical Medicine Research Centre of Prenatal Diagnosis and Birth Health in Hubei Province, Wuhan, Hubei, China</nlm:aff>
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<author><name sortKey="Zhang, Wei" sort="Zhang, Wei" uniqKey="Zhang W" first="Wei" last="Zhang">Wei Zhang</name>
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<wicri:regionArea>Department of Preventive Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL</wicri:regionArea>
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<author><name sortKey="Li, Jiafu" sort="Li, Jiafu" uniqKey="Li J" first="Jiafu" last="Li">Jiafu Li</name>
<affiliation wicri:level="1"><nlm:aff id="aff1">Department of Gynaecology and Obstetrics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China</nlm:aff>
<country xml:lang="fr">République populaire de Chine</country>
<wicri:regionArea>Department of Gynaecology and Obstetrics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei</wicri:regionArea>
<wicri:noRegion>Hubei</wicri:noRegion>
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<affiliation wicri:level="1"><nlm:aff id="aff3">Clinical Medicine Research Centre of Prenatal Diagnosis and Birth Health in Hubei Province, Wuhan, Hubei, China</nlm:aff>
<country xml:lang="fr">République populaire de Chine</country>
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<author><name sortKey="Zhao, Dongchi" sort="Zhao, Dongchi" uniqKey="Zhao D" first="Dongchi" last="Zhao">Dongchi Zhao</name>
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<country xml:lang="fr">République populaire de Chine</country>
<wicri:regionArea>Department of Paediatrics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei</wicri:regionArea>
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<author><name sortKey="Xu, Dan" sort="Xu, Dan" uniqKey="Xu D" first="Dan" last="Xu">Dan Xu</name>
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<country xml:lang="fr">République populaire de Chine</country>
<wicri:regionArea>Department of Gynaecology and Obstetrics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei</wicri:regionArea>
<wicri:noRegion>Hubei</wicri:noRegion>
</affiliation>
<affiliation wicri:level="1"><nlm:aff id="aff3">Clinical Medicine Research Centre of Prenatal Diagnosis and Birth Health in Hubei Province, Wuhan, Hubei, China</nlm:aff>
<country xml:lang="fr">République populaire de Chine</country>
<wicri:regionArea>Clinical Medicine Research Centre of Prenatal Diagnosis and Birth Health in Hubei Province, Wuhan, Hubei</wicri:regionArea>
<wicri:noRegion>Hubei</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Gong, Qing" sort="Gong, Qing" uniqKey="Gong Q" first="Qing" last="Gong">Qing Gong</name>
<affiliation wicri:level="1"><nlm:aff id="aff1">Department of Gynaecology and Obstetrics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China</nlm:aff>
<country xml:lang="fr">République populaire de Chine</country>
<wicri:regionArea>Department of Gynaecology and Obstetrics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei</wicri:regionArea>
<wicri:noRegion>Hubei</wicri:noRegion>
</affiliation>
<affiliation wicri:level="1"><nlm:aff id="aff3">Clinical Medicine Research Centre of Prenatal Diagnosis and Birth Health in Hubei Province, Wuhan, Hubei, China</nlm:aff>
<country xml:lang="fr">République populaire de Chine</country>
<wicri:regionArea>Clinical Medicine Research Centre of Prenatal Diagnosis and Birth Health in Hubei Province, Wuhan, Hubei</wicri:regionArea>
<wicri:noRegion>Hubei</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Liao, Jing" sort="Liao, Jing" uniqKey="Liao J" first="Jing" last="Liao">Jing Liao</name>
<affiliation wicri:level="1"><nlm:aff id="aff1">Department of Gynaecology and Obstetrics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China</nlm:aff>
<country xml:lang="fr">République populaire de Chine</country>
<wicri:regionArea>Department of Gynaecology and Obstetrics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei</wicri:regionArea>
<wicri:noRegion>Hubei</wicri:noRegion>
</affiliation>
<affiliation wicri:level="1"><nlm:aff id="aff3">Clinical Medicine Research Centre of Prenatal Diagnosis and Birth Health in Hubei Province, Wuhan, Hubei, China</nlm:aff>
<country xml:lang="fr">République populaire de Chine</country>
<wicri:regionArea>Clinical Medicine Research Centre of Prenatal Diagnosis and Birth Health in Hubei Province, Wuhan, Hubei</wicri:regionArea>
<wicri:noRegion>Hubei</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Yang, Huixia" sort="Yang, Huixia" uniqKey="Yang H" first="Huixia" last="Yang">Huixia Yang</name>
<affiliation wicri:level="3"><nlm:aff id="aff5">Department of Obstetrics and Gynaecology, Peking University First Hospital, Beijing, China</nlm:aff>
<country xml:lang="fr">République populaire de Chine</country>
<wicri:regionArea>Department of Obstetrics and Gynaecology, Peking University First Hospital, Beijing</wicri:regionArea>
<placeName><settlement type="city">Pékin</settlement>
</placeName>
</affiliation>
</author>
<author><name sortKey="Hou, Wei" sort="Hou, Wei" uniqKey="Hou W" first="Wei" last="Hou">Wei Hou</name>
<affiliation wicri:level="4"><nlm:aff id="aff4">State Key Laboratory of Virology/Institute of Medical Virology, School of Basic Medical Sciences, Wuhan University, Wuhan, Hubei, China</nlm:aff>
<country xml:lang="fr">République populaire de Chine</country>
<wicri:regionArea>State Key Laboratory of Virology/Institute of Medical Virology, School of Basic Medical Sciences, Wuhan University, Wuhan, Hubei</wicri:regionArea>
<orgName type="university">Université de Wuhan</orgName>
<placeName><settlement type="city">Wuhan</settlement>
<region type="province">Hubei</region>
</placeName>
</affiliation>
</author>
<author><name sortKey="Zhang, Yuanzhen" sort="Zhang, Yuanzhen" uniqKey="Zhang Y" first="Yuanzhen" last="Zhang">Yuanzhen Zhang</name>
<affiliation wicri:level="1"><nlm:aff id="aff1">Department of Gynaecology and Obstetrics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China</nlm:aff>
<country xml:lang="fr">République populaire de Chine</country>
<wicri:regionArea>Department of Gynaecology and Obstetrics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei</wicri:regionArea>
<wicri:noRegion>Hubei</wicri:noRegion>
</affiliation>
<affiliation wicri:level="1"><nlm:aff id="aff3">Clinical Medicine Research Centre of Prenatal Diagnosis and Birth Health in Hubei Province, Wuhan, Hubei, China</nlm:aff>
<country xml:lang="fr">République populaire de Chine</country>
<wicri:regionArea>Clinical Medicine Research Centre of Prenatal Diagnosis and Birth Health in Hubei Province, Wuhan, Hubei</wicri:regionArea>
<wicri:noRegion>Hubei</wicri:noRegion>
</affiliation>
</author>
</analytic>
<series><title level="j">Lancet (London, England)</title>
<idno type="ISSN">0140-6736</idno>
<idno type="eISSN">1474-547X</idno>
<imprint><date when="2020">2020</date>
</imprint>
</series>
</biblStruct>
</sourceDesc>
</fileDesc>
<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Betacoronavirus (isolation & purification)</term>
<term>Betacoronavirus (pathogenicity)</term>
<term>Cesarean Section</term>
<term>Coronavirus Infections (complications)</term>
<term>Coronavirus Infections (transmission)</term>
<term>Cough (etiology)</term>
<term>Dyspepsia (etiology)</term>
<term>Female</term>
<term>Fever (etiology)</term>
<term>Humans</term>
<term>Infant, Newborn</term>
<term>Infectious Disease Transmission, Vertical</term>
<term>Myalgia (etiology)</term>
<term>Pharyngitis (etiology)</term>
<term>Pneumonia, Viral (complications)</term>
<term>Pneumonia, Viral (diagnosis)</term>
<term>Pneumonia, Viral (transmission)</term>
<term>Pregnancy</term>
<term>Pregnancy Complications, Infectious (diagnosis)</term>
<term>Pregnancy Outcome</term>
<term>Pregnancy Trimester, Third</term>
<term>Retrospective Studies</term>
</keywords>
<keywords scheme="KwdFr" xml:lang="fr"><term>Complications de la grossesse et maladies infectieuses (diagnostic)</term>
<term>Césarienne</term>
<term>Dyspepsie (étiologie)</term>
<term>Femelle</term>
<term>Fièvre (étiologie)</term>
<term>Grossesse</term>
<term>Humains</term>
<term>Infections à coronavirus ()</term>
<term>Infections à coronavirus (transmission)</term>
<term>Issue de la grossesse</term>
<term>Myalgie (étiologie)</term>
<term>Nouveau-né</term>
<term>Pharyngite (étiologie)</term>
<term>Pneumopathie virale ()</term>
<term>Pneumopathie virale (diagnostic)</term>
<term>Pneumopathie virale (transmission)</term>
<term>Toux (étiologie)</term>
<term>Transmission verticale de maladie infectieuse</term>
<term>Troisième trimestre de grossesse</term>
<term>Études rétrospectives</term>
</keywords>
<keywords scheme="MESH" qualifier="complications" xml:lang="en"><term>Coronavirus Infections</term>
<term>Pneumonia, Viral</term>
</keywords>
<keywords scheme="MESH" qualifier="diagnosis" xml:lang="en"><term>Pneumonia, Viral</term>
<term>Pregnancy Complications, Infectious</term>
</keywords>
<keywords scheme="MESH" qualifier="diagnostic" xml:lang="fr"><term>Complications de la grossesse et maladies infectieuses</term>
<term>Pneumopathie virale</term>
</keywords>
<keywords scheme="MESH" qualifier="etiology" xml:lang="en"><term>Cough</term>
<term>Dyspepsia</term>
<term>Fever</term>
<term>Myalgia</term>
<term>Pharyngitis</term>
</keywords>
<keywords scheme="MESH" qualifier="isolation & purification" xml:lang="en"><term>Betacoronavirus</term>
</keywords>
<keywords scheme="MESH" qualifier="pathogenicity" xml:lang="en"><term>Betacoronavirus</term>
</keywords>
<keywords scheme="MESH" qualifier="transmission" xml:lang="en"><term>Coronavirus Infections</term>
<term>Pneumonia, Viral</term>
</keywords>
<keywords scheme="MESH" qualifier="étiologie" xml:lang="fr"><term>Dyspepsie</term>
<term>Fièvre</term>
<term>Infections à coronavirus</term>
<term>Myalgie</term>
<term>Pharyngite</term>
<term>Pneumopathie virale</term>
<term>Toux</term>
</keywords>
<keywords scheme="MESH" xml:lang="en"><term>Cesarean Section</term>
<term>Female</term>
<term>Humans</term>
<term>Infant, Newborn</term>
<term>Infectious Disease Transmission, Vertical</term>
<term>Pregnancy</term>
<term>Pregnancy Outcome</term>
<term>Pregnancy Trimester, Third</term>
<term>Retrospective Studies</term>
</keywords>
<keywords scheme="MESH" xml:lang="fr"><term>Césarienne</term>
<term>Femelle</term>
<term>Grossesse</term>
<term>Humains</term>
<term>Infections à coronavirus</term>
<term>Issue de la grossesse</term>
<term>Nouveau-né</term>
<term>Pneumopathie virale</term>
<term>Transmission verticale de maladie infectieuse</term>
<term>Troisième trimestre de grossesse</term>
<term>Études rétrospectives</term>
</keywords>
</textClass>
</profileDesc>
</teiHeader>
<front><div type="abstract" xml:lang="en"><title>Summary</title>
<sec><title>Background</title>
<p>Previous studies on the pneumonia outbreak caused by the 2019 novel coronavirus disease (COVID-19) were based on information from the general population. Limited data are available for pregnant women with COVID-19 pneumonia. This study aimed to evaluate the clinical characteristics of COVID-19 in pregnancy and the intrauterine vertical transmission potential of COVID-19 infection.</p>
</sec>
<sec><title>Methods</title>
<p>Clinical records, laboratory results, and chest CT scans were retrospectively reviewed for nine pregnant women with laboratory-confirmed COVID-19 pneumonia (ie, with maternal throat swab samples that were positive for severe acute respiratory syndrome coronavirus 2 [SARS-CoV-2]) who were admitted to Zhongnan Hospital of Wuhan University, Wuhan, China, from Jan 20 to Jan 31, 2020. Evidence of intrauterine vertical transmission was assessed by testing for the presence of SARS-CoV-2 in amniotic fluid, cord blood, and neonatal throat swab samples. Breastmilk samples were also collected and tested from patients after the first lactation.</p>
</sec>
<sec><title>Findings</title>
<p>All nine patients had a caesarean section in their third trimester. Seven patients presented with a fever. Other symptoms, including cough (in four of nine patients), myalgia (in three), sore throat (in two), and malaise (in two), were also observed. Fetal distress was monitored in two cases. Five of nine patients had lymphopenia (<1·0 × 10⁹ cells per L). Three patients had increased aminotransferase concentrations. None of the patients developed severe COVID-19 pneumonia or died, as of Feb 4, 2020. Nine livebirths were recorded. No neonatal asphyxia was observed in newborn babies. All nine livebirths had a 1-min Apgar score of 8–9 and a 5-min Apgar score of 9–10. Amniotic fluid, cord blood, neonatal throat swab, and breastmilk samples from six patients were tested for SARS-CoV-2, and all samples tested negative for the virus.</p>
</sec>
<sec><title>Interpretation</title>
<p>The clinical characteristics of COVID-19 pneumonia in pregnant women were similar to those reported for non-pregnant adult patients who developed COVID-19 pneumonia. Findings from this small group of cases suggest that there is currently no evidence for intrauterine infection caused by vertical transmission in women who develop COVID-19 pneumonia in late pregnancy.</p>
</sec>
<sec><title>Funding</title>
<p>Hubei Science and Technology Plan, Wuhan University Medical Development Plan.</p>
</sec>
</div>
</front>
<back><div1 type="bibliography"><listBibl><biblStruct><analytic><author><name sortKey="Zhu, N" uniqKey="Zhu N">N Zhu</name>
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<author><name sortKey="Zhang, D" uniqKey="Zhang D">D Zhang</name>
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<author><name sortKey="Wang, W" uniqKey="Wang W">W Wang</name>
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</analytic>
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<biblStruct><analytic><author><name sortKey="Huang, C" uniqKey="Huang C">C Huang</name>
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<author><name sortKey="Wang, Y" uniqKey="Wang Y">Y Wang</name>
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<biblStruct><analytic><author><name sortKey="Corman, Vm" uniqKey="Corman V">VM Corman</name>
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<biblStruct><analytic><author><name sortKey="Wong, Sf" uniqKey="Wong S">SF Wong</name>
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</analytic>
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<biblStruct><analytic><author><name sortKey="Zhang, Yz" uniqKey="Zhang Y">YZ Zhang</name>
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</analytic>
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<biblStruct><analytic><author><name sortKey="De Wit, E" uniqKey="De Wit E">E de Wit</name>
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<author><name sortKey="Van Doremalen, N" uniqKey="Van Doremalen N">N van Doremalen</name>
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<author><name sortKey="Falzarano, D" uniqKey="Falzarano D">D Falzarano</name>
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<author><name sortKey="Munster, Vj" uniqKey="Munster V">VJ Munster</name>
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<biblStruct><analytic><author><name sortKey="Zhou, P" uniqKey="Zhou P">P Zhou</name>
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</author>
<author><name sortKey="Fung, Gp" uniqKey="Fung G">GP Fung</name>
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<biblStruct><analytic><author><name sortKey="Bouthry, E" uniqKey="Bouthry E">E Bouthry</name>
</author>
<author><name sortKey="Picone, O" uniqKey="Picone O">O Picone</name>
</author>
<author><name sortKey="Hamdi, G" uniqKey="Hamdi G">G Hamdi</name>
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<author><name sortKey="Grangeot Keros, L" uniqKey="Grangeot Keros L">L Grangeot-Keros</name>
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<author><name sortKey="Vauloup Fellous, C" uniqKey="Vauloup Fellous C">C Vauloup-Fellous</name>
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<biblStruct><analytic><author><name sortKey="Niu, Y" uniqKey="Niu Y">Y Niu</name>
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<author><name sortKey="Yue, H" uniqKey="Yue H">H Yue</name>
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<biblStruct><analytic><author><name sortKey="Zhang, Z" uniqKey="Zhang Z">Z Zhang</name>
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</listBibl>
</div1>
</back>
</TEI>
<affiliations><list><country><li>République populaire de Chine</li>
<li>États-Unis</li>
</country>
<region><li>Hubei</li>
<li>Illinois</li>
</region>
<settlement><li>Pékin</li>
<li>Wuhan</li>
</settlement>
<orgName><li>Université de Wuhan</li>
</orgName>
</list>
<tree><country name="République populaire de Chine"><noRegion><name sortKey="Chen, Huijun" sort="Chen, Huijun" uniqKey="Chen H" first="Huijun" last="Chen">Huijun Chen</name>
</noRegion>
<name sortKey="Chen, Huijun" sort="Chen, Huijun" uniqKey="Chen H" first="Huijun" last="Chen">Huijun Chen</name>
<name sortKey="Gong, Qing" sort="Gong, Qing" uniqKey="Gong Q" first="Qing" last="Gong">Qing Gong</name>
<name sortKey="Gong, Qing" sort="Gong, Qing" uniqKey="Gong Q" first="Qing" last="Gong">Qing Gong</name>
<name sortKey="Guo, Juanjuan" sort="Guo, Juanjuan" uniqKey="Guo J" first="Juanjuan" last="Guo">Juanjuan Guo</name>
<name sortKey="Guo, Juanjuan" sort="Guo, Juanjuan" uniqKey="Guo J" first="Juanjuan" last="Guo">Juanjuan Guo</name>
<name sortKey="Hou, Wei" sort="Hou, Wei" uniqKey="Hou W" first="Wei" last="Hou">Wei Hou</name>
<name sortKey="Li, Jiafu" sort="Li, Jiafu" uniqKey="Li J" first="Jiafu" last="Li">Jiafu Li</name>
<name sortKey="Li, Jiafu" sort="Li, Jiafu" uniqKey="Li J" first="Jiafu" last="Li">Jiafu Li</name>
<name sortKey="Liao, Jing" sort="Liao, Jing" uniqKey="Liao J" first="Jing" last="Liao">Jing Liao</name>
<name sortKey="Liao, Jing" sort="Liao, Jing" uniqKey="Liao J" first="Jing" last="Liao">Jing Liao</name>
<name sortKey="Luo, Fan" sort="Luo, Fan" uniqKey="Luo F" first="Fan" last="Luo">Fan Luo</name>
<name sortKey="Wang, Chen" sort="Wang, Chen" uniqKey="Wang C" first="Chen" last="Wang">Chen Wang</name>
<name sortKey="Xu, Dan" sort="Xu, Dan" uniqKey="Xu D" first="Dan" last="Xu">Dan Xu</name>
<name sortKey="Xu, Dan" sort="Xu, Dan" uniqKey="Xu D" first="Dan" last="Xu">Dan Xu</name>
<name sortKey="Yang, Huixia" sort="Yang, Huixia" uniqKey="Yang H" first="Huixia" last="Yang">Huixia Yang</name>
<name sortKey="Yu, Xuechen" sort="Yu, Xuechen" uniqKey="Yu X" first="Xuechen" last="Yu">Xuechen Yu</name>
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<name sortKey="Zhang, Yuanzhen" sort="Zhang, Yuanzhen" uniqKey="Zhang Y" first="Yuanzhen" last="Zhang">Yuanzhen Zhang</name>
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</country>
<country name="États-Unis"><region name="Illinois"><name sortKey="Zhang, Wei" sort="Zhang, Wei" uniqKey="Zhang W" first="Wei" last="Zhang">Wei Zhang</name>
</region>
</country>
</tree>
</affiliations>
</record>

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Clinical characteristics and intrauterine vertical transmission potential of COVID-19 infection in nine pregnant women: a retrospective review of medical records

Clinical characteristics and intrauterine vertical transmission potential of COVID-19 infection in nine pregnant women: a retrospective review of medical records

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