| 54 | Atlanta |
| 48 | Ontario |
| 45 | Geneva |
| 43 | Bangkok |
| 42 | Bilthoven |
| 39 | Victoria |
| 31 | Hong Kong Special Administrative Region |
| 30 | Saitama |
| 28 | Wellington |
| 28 | Shanghai |
| 26 | Taipei |
| 26 | Jerusalem |
| 25 | ON |
| 24 | Queensland |
| 24 | Hong Kong |
| 22 | NSW |
| 21 | Pokfulam |
| 21 | Cambridge |
| 20 | Hong Kong SAR |
| 20 | Ankara |
| 19 | Buenos Aires |
| 19 | Basel |
| 18 | Singapore |
| 17 | Tehran |
| 17 | Brisbane |
| 17 | Auckland |
| 16 | Mexico City |
| 16 | Memphis, Tennessee 38105 |
| 16 | London W2 1PG |
| 16 | Canberra |
| 15 | Toronto, Ontario |
| 15 | Perth |
| 15 | New South Wales |
| 15 | Leicester |
| 15 | Hanoi |
| 15 | Bergen |
| 15 | Alberta |
| 14 | Toronto |
| 14 | Sheffield |
| 14 | Ministry of Health |
| 14 | Georgia 30333 |
| 14 | Daejeon |
| 14 | Bethesda |
| 14 | Atlanta, Georgia 30333 |
| 13 | Sydney, NSW |
| 13 | Southampton |
| 13 | Liverpool |
| 13 | Helsinki |
| 13 | Bristol |
| 13 | Ann Arbor |
| 12 | Sapporo |
| 12 | Saitama 332-0012 |
| 12 | Saint-Maurice |
| 12 | Québec |
| 12 | Nottingham |
| 12 | New Delhi |
| 12 | Ho Chi Minh City |
| 12 | Glasgow |
| 12 | Cairo |
| 11 | Trento |
| 11 | Santiago |
| 11 | Manitoba |
| 11 | London SE5 8AF |
| 11 | Harbin |
| 11 | GlaxoSmithKline Biologicals |
| 11 | 3720 BA Bilthoven |
| 11 | 3000 CA Rotterdam |
| 10 | Western Australia |
| 10 | Tel Aviv |
| 10 | Taiwan |
| 10 | Siena |
| 10 | Ottawa |
| 10 | Nonthaburi |
| 10 | Melbourne, VIC |
| 10 | Madison, Wisconsin 53706 |
| 10 | London WC1E 7HT |
| 10 | London NW7 1AA |
| 10 | Kuala Lumpur |
| 10 | Harbin 150001 |
| 10 | Coventry CV4 7AL |
| 10 | Bethesda, Maryland 20892 |
| 10 | 1211 Geneva |
| 9 | Winnipeg, Manitoba |
| 9 | Valencia |
| 9 | Toronto, ON |
| 9 | Riyadh |
| 9 | QLD |
| 9 | Osaka |
| 9 | New York, New York 10029 |
| 9 | Lima |
| 9 | Edmonton, Alberta |
| 9 | Christchurch |
| 9 | Centers for Disease Control and Prevention |
| 9 | British Columbia |
| 9 | Beer-Sheva |
| 9 | BC |
| 8 | WHO Collaborating Centre for Reference and Research on Influenza |
| 8 | Vancouver |
| 8 | Uppsala |
| 8 | Umeå |
| 8 | Sevilla |
| 8 | Quebec |
| 8 | Padova |
| 8 | Ottawa, Ontario |
| 8 | Ottawa, ON |
| 8 | National Institute of Hygiene and Epidemiology |
| 8 | Maryland 21205 |
| 8 | London NW9 5EQ |
| 8 | Istanbul |
| 8 | Genève |
| 8 | Dublin |
| 8 | Coventry |
| 8 | Chengdu |
| 8 | Cape Town |
| 8 | British Columbia Centre for Disease Control |
| 8 | ACT |
| 7 | Taoyuan |
| 7 | Taichung |
| 7 | Regensburg |
| 7 | Naples |
| 7 | Nairobi |
| 7 | Monza |
| 7 | Maryland 21202 |
| 7 | Maryland 20892 |
| 7 | Lisboa |
| 7 | Leuven |
| 7 | Johannesburg |
| 7 | Ghent |
| 7 | Cork |
| 7 | Cheongju |
| 7 | Charlottesville |
| 7 | Cardiff |
| 7 | Canberra, ACT |
| 7 | 3015 GE Rotterdam |
| 6 | Xiamen |
| 6 | Warsaw |
| 6 | Victorian Infectious Diseases Reference Laboratory |
| 6 | Vancouver, British Columbia |
| 6 | VIC |
| 6 | Thessaloniki |
| 6 | The University of Hong Kong |
| 6 | Tarragona |
| 6 | Solna |
| 6 | Shizuoka |
| 6 | Shantou |
| 6 | Saskatchewan |
| 6 | Sapporo 060-0818 |
| 6 | Portsmouth |
| 6 | Perth, WA |
| 6 | Pamplona |
| 6 | Hsinchu |
| 6 | Haifa |
| 6 | Granada |
| 6 | ERATO Infection-Induced Host Responses Project |
| 6 | Dunedin |
| 6 | D.C. |
| 6 | Columbus |
| 6 | Changsha |
| 6 | CSL Limited |
| 6 | Antananarivo |
| 6 | Adelaide |
| 6 | 53100 Siena |
| 6 | 5021 Bergen |
| 6 | 3000 DR Rotterdam |
| 6 | 1211 Geneva 27 |
| 5 | York |
| 5 | Xi'an |
| 5 | WA |
| 5 | Tel Hashomer |
| 5 | Tainan |
| 5 | St. Petersburg |
| 5 | Singapore 117597 |
| 5 | Shatin |
| 5 | Shatin, New Territories |
| 5 | Shantou, Guangdong |
| 5 | Shantou, Guangdong 515031 |
| 5 | Shanghai 200032 |
| 5 | Seville |
| 5 | Scotland |
| 5 | Salt Lake City |
| 5 | Rockville, Maryland 20850 |
| 5 | Reykjavik |
| 5 | Qld |
| 5 | Pretoria |
| 5 | Phnom Penh |
| 5 | Perth, Western Australia |
| 5 | Pavia |
| 5 | Parma |
| 5 | Palermo |
| 5 | Orth/Donau |
| 5 | Ontario Agency for Health Protection and Promotion |
| 5 | Novosibirsk |
| 5 | Novartis Vaccines and Diagnostics |
| 5 | Nova Scotia |
| 5 | Newcastle |
| 5 | Nashville |
| 5 | Nanjing |
| 5 | Montreal, Quebec |
| 5 | Minnesota Department of Health |
| 5 | Memphis |
| 5 | Lisbon |
| 5 | Lanzhou |
| 5 | Langen |
| 5 | Kanagawa |
| 5 | Kalmar |
| 5 | Jinan |
| 5 | Jena |
| 5 | Institut national de santé publique du Québec |
| 5 | InVS) |
| 5 | Imperial College London |
| 5 | Health Protection Scotland |
| 5 | Halifax, Nova Scotia |
| 5 | HKU-Pasteur Research Centre |
| 5 | Guangdong |
| 5 | Greifswald-Insel Riems |
| 5 | Giza |
| 5 | Giessen |
| 5 | Edmonton |
| 5 | Edmonton, AB |
| 5 | Distrito Federal |
| 5 | Department of Microbiology, The University of Hong Kong, Hong Kong Special Administrative Region |
| 5 | Chongqing |
| 5 | Chiba |
| 5 | Belgrade |
| 5 | Bangkok 10330 |
| 5 | Australian Army Malaria Institute |
| 5 | Adana |
| 5 | Aberdeen |
| 5 | 3508 GA Utrecht |
| 4 | Zurich |
| 4 | Zagreb |
| 4 | Yokohama |
| 4 | Yaoundé |
| 4 | Wisconsin 53706 |
| 4 | Weybridge |
| 4 | Westmead, New South Wales |
| 4 | Wellington South |
| 4 | Verona |
| 4 | Vancouver, BC |
| 4 | Upper Hutt |
| 4 | University of Tübingen |
| 4 | The Children's Hospital at Westmead |
| 4 | Tampere |
| 4 | Szeged |
| 4 | Surrey |
| 4 | Surabaya |
| 4 | South Australia |
| 4 | Singapore 308433 |
| 4 | Shandong |
| 4 | Sergy Haut |
| 4 | Seattle |
| 4 | Sassari |
| 4 | Santander |
| 4 | Rixensart |
| 4 | Porto |
| 4 | Plymouth |
| 4 | Palma de Mallorca |
| 4 | Norwich |
| 4 | New York 10029 |
| 4 | New Mexico Department of Health |
| 4 | New Haven |
| 4 | National Institute for Public Health and the Environment |
| 4 | Nagasaki |
| 4 | NW7 1AA |
| 4 | Morelos |
| 4 | Ministry of Public Health |
| 4 | Milano |
| 4 | Middlesex |
| 4 | Melbourne, Victoria |
| 4 | Marcy l'Etoile |
| 4 | Madison |
| 4 | Maastricht |
| 4 | Lund |
| 4 | London E1 4NS |
| 4 | León |
| 4 | Leicester LE1 5WW |
| 4 | Karachi |
| 4 | Jakarta |
| 4 | Institute for Clinical Evaluative Sciences |
| 4 | Institut Pasteur |
| 4 | Innsbruck |
| 4 | Ibaraki |
| 4 | Hyogo |
| 4 | Hunan |
| 4 | Hubei |
| 4 | Hokkaido |
| 4 | Hertfordshire |
| 4 | Health Protection Surveillance Centre |
| 4 | Halifax |
| 4 | HKU-Pasteur Research Centre, Hong Kong Special Administrative Region |
| 4 | Gwangju |
| 4 | Guangdong Province |
| 4 | Gothenburg |
| 4 | Georgia 30322 |
| 4 | Enoggera |
| 4 | Department of Microbiology, The University of Hong Kong |
| 4 | Department of Infectious Diseases, Tan Tock Seng Hospital |
| 4 | Department of Clinical Epidemiology, Tan Tock Seng Hospital |
| 4 | Debrecen |
| 4 | D.F. |
| 4 | Cuernavaca |
| 4 | Cordoba |
| 4 | Colorado Department of Public Health and Environment |
| 4 | Colindale |
| 4 | Chennai |
| 4 | Catania |
| 4 | California 92037 |
| 4 | Bucharest |
| 4 | Brisbane, Queensland |
| 4 | Brisbane, QLD |
| 4 | Boston MA |
| 4 | Bologna |
| 4 | Belfast |
| 4 | Beer Sheva |
| 4 | Bangkok 10400 |
| 4 | Antwerp |
| 4 | Albany |
| 4 | Albany, New York 12201 |
| 4 | Aichi |
| 4 | Abidjan |
| 4 | Aarhus |
| 4 | 9713 AV Groningen |
| 4 | 40127 Bologna |
| 4 | 3500 BN Utrecht |
| 4 | 2300 RC Leiden |
| 3 | Zhejiang |
| 3 | Yinchuan |
| 3 | Yangzhou 225009 |
| 3 | World Health Organization |
| 3 | Winnipeg |
| 3 | West of Scotland Specialist Virology Centre |
| 3 | Wavre |
| 3 | WC1E 7HT |
| 3 | Villejuif |
| 3 | Vellore |
| 3 | Valladolid |
| 3 | University of Tromsø |
| 3 | University of Trento |
| 3 | University of Strathclyde |
| 3 | University of Regensburg |
| 3 | University of Otago |
| 3 | University of Oslo |
| 3 | University of Muenster |
| 3 | University of Hong Kong |
| 3 | University of Alberta |
| 3 | Ulaanbaatar |
| 3 | USA |
| 3 | Tourcoing |
| 3 | Tottori |
| 3 | Tottori 680-8553 |
| 3 | Tennessee 38105 |
| 3 | Tempe |
| 3 | Tel-Aviv |
| 3 | Tasmania |
| 3 | Tamil Nadu |
| 3 | Taipei 115 |
| 3 | Taipei 112 |
| 3 | Taipei 10617 |
| 3 | Swedish Institute for Infectious Disease Control |
| 3 | Suzhou 215004 |
| 3 | Surrey KT15 3NB |
| 3 | Suresnes |
| 3 | Special Administrative Region |
| 3 | Sonora |
| 3 | Singapore 529889 |
| 3 | Singapore 119228 |
| 3 | Singapore 119074 |
| 3 | Shiraz |
| 3 | Sheffield S10 2RX |
| 3 | Shanghai 200433 |
| 3 | Shanghai 200031 |
| 3 | Sendai |
| 3 | Selangor |
| 3 | San Sebastián |
| 3 | Saint-Denis |
| 3 | Sabadell |
| 3 | SK |
| 3 | Roskilde |
| 3 | Rochester |
| 3 | Rochester, New York 14642 |
| 3 | Research Center in Infectious Diseases of the CHUQ-CHUL and Laval University |
| 3 | Ramat Gan |
| 3 | Quebec City, Quebec |
| 3 | Pune |
| 3 | Public Health Ontario |
| 3 | Public Health Agency of Canada |
| 3 | Pittsburgh, Pennsylvania 15261 |
| 3 | Phitsanulok |
| 3 | Peterborough |
| 3 | Pennsylvania Department of Health |
| 3 | Pathumthani |
| 3 | Parkville, Victoria |
| 3 | Palmerston North |
| 3 | Padua |
| 3 | Oxford OX1 3PS |
| 3 | Oulu |
| 3 | Ottawa Hospital Research Institute |
| 3 | Okayama |
| 3 | Niigata |
| 3 | Niamey |
| 3 | Neuherberg |
| 3 | Neuchâtel |
| 3 | Nedlands |
| 3 | National University Hospital |
| 3 | National Institute of Public Health |
| 3 | National Institute for Health and Welfare |
| 3 | Nashville, Tennessee 37232 |
| 3 | Nakhon Pathom |
| 3 | Nagoya |
| 3 | NW9 5EQ |
| 3 | NSW 2145 |
| 3 | Montevideo |
| 3 | Memphis, Tennessee 38105-2794 |
| 3 | Medicines Evaluation Board |
| 3 | Maryland 20850 |
| 3 | Manitoba R3E 3R2 |
| 3 | Manila |
| 3 | Malmö |
| 3 | M4N 3M5 |
| 3 | Lucknow |
| 3 | Los Alamos, New Mexico 87545 |
| 3 | London NW9 5HT |
| 3 | Ljubljana |
| 3 | Laval University |
| 3 | Kunming |
| 3 | Konya |
| 3 | Kobe |
| 3 | Kaohsiung |
| 3 | Instituto de Salud Pública de Navarra |
| 3 | Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention |
| 3 | Incheon |
| 3 | Hyogo 650-0017 |
| 3 | Hsinchu 300 |
| 3 | Hospital Universitario Virgen Macarena |
| 3 | Hospital San Pedro-CIBIR |
| 3 | Hong Kong (SAR) |
| 3 | Hertfordshire EN6 3QG |
| 3 | Health Protection Agency |
| 3 | Hampshire |
| 3 | Halifax, NS |
| 3 | Gyeonggi-do |
| 3 | Guangxi |
| 3 | Girona |
| 3 | Georgia 30602 |
| 3 | Genoa |
| 3 | Geelong |
| 3 | Fukuoka |
| 3 | Federal Ministry of Health |
| 3 | European Commission |
| 3 | Emory University |
| 3 | Edinburgh EH9 3JT |
| 3 | EN6 3QG |
| 3 | Dundee |
| 3 | Duke-NUS Medical School |
| 3 | District Government Stuttgart |
| 3 | Dillenburg |
| 3 | Diepenbeek |
| 3 | Department of Microbiology, Queen Mary Hospital |
| 3 | Department of Microbiology, Li Ka Shing Faculty of Medicine, University of Hong Kong |
| 3 | Department of Microbiology, Li Ka Shing Faculty of Medicine, The University of Hong Kong |
| 3 | Delhi |
| 3 | Daegu |
| 3 | D. C. |
| 3 | Colindale, London NW9 5HT |
| 3 | Colchester Research Group |
| 3 | Co. Dublin |
| 3 | Chuncheon |
| 3 | Chieti |
| 3 | Chandigarh |
| 3 | Cambridge CB2 3EJ |
| 3 | California Emerging Infections Program |
| 3 | Busan |
| 3 | Bron |
| 3 | Brighton Collaboration Foundation |
| 3 | Bondy |
| 3 | Bochum |
| 3 | Bizkaia |
| 3 | Bath |
| 3 | Bandung 40161 |
| 3 | Almería |
| 3 | Alessandria |
| 3 | A-2304 Orth/Donau |
| 3 | 8092 Zurich |
| 3 | 50603 Kuala Lumpur |
| 3 | 42122 Reggio Emilia |
| 3 | 2304 Orth/Donau |
| 3 | 2301 CA Leiden |
| 3 | 20133 Milano |
| 3 | 197376 St. Petersburg |
| 3 | 18057 Rostock |
| 3 | 17493 Greifswald-Insel Riems |
| 3 | 169857 |
| 3 | 1211 Geneva 20 |
| 3 | 07745, Jena |
| 3 | 00-791 Warsaw |
| 2 | Örebro |
| 2 | Zhengzhou |
| 2 | Zhejiang Province |
| 2 | Zerifin |
| 2 | Yvoir |
