About the Authors

Jessica Hartman Jacobs

jhartman44@gmail.com

Affiliation Department of Epidemiology, Harvard School of Public Health, Boston, Massachusetts, United States of America

Brett Nicholas Archer

Affiliation National Institute for Communicable Diseases, National Health Laboratory Service, Johannesburg, South Africa

Michael G. Baker

Affiliation Department of Public Health, University of Otago, Wellington, New Zealand

Benjamin J. Cowling

Affiliation School of Public Health, The University of Hong Kong, Hong Kong Special Administrative Region, China

Richard T. Heffernan

Affiliation Division of Public Health, Wisconsin Department of Health Services, Madison, Wisconsin, United States of America

Geoff Mercer

Affiliation National Centre for Epidemiology and Population Health, Australian National University, Canberra, Australia

Osvaldo Uez

Affiliation National Institute of Epidemiology, ANLIS, Ministry of Public Health, Buenos Aires, Argentina

Wanna Hanshaoworakul

Affiliation Department of Disease Control, Ministry of Public Health, Tiwanond, Nonthaburi, Thailand

Cécile Viboud

Affiliation Division of International Epidemiology and Population Studies, Fogarty International Center, National Institutes of Health, Bethesda, Maryland, United States of America

Joel Schwartz

Affiliations Department of Epidemiology, Harvard School of Public Health, Boston, Massachusetts, United States of America, Department of Environmental Health, Harvard School of Public Health, Boston, Massachusetts, United States of America

Eric Tchetgen Tchetgen

Affiliations Department of Epidemiology, Harvard School of Public Health, Boston, Massachusetts, United States of America, Department of Biostatistics, Harvard School of Public Health, Boston, Massachusetts, United States of America

Marc Lipsitch

Affiliations Department of Epidemiology, Harvard School of Public Health, Boston, Massachusetts, United States of America, Department of Immunology and Infectious Diseases, Harvard School of Public Health, Boston, Massachusetts, United States of America

Competing Interests

BJC has received research funding from MedImmune Inc. and consults for Crucell MV. ML declares consulting income/honoraria from Pfizer, Novartis, Avian/Pandemic Flu Registry (Outcome Sciences, supported by Roche), and AIR Worldwide. The following co-authors are editors: Benjamin J Cowling and Cecile Viboud. This does not alter the authors‘ adherence to all the PLoS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: JHJ ETT ML. Analyzed the data: JHJ. Contributed reagents/materials/analysis tools: BNA MGB BJC RTH GM OU WH. Wrote the paper: JHJ BNA MGB BJC RTH GM OU WH CV JS ETT ML.