About the Authors

Srinivas S. Rao

Affiliation Vaccine Research Center, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health, Bethesda, Maryland, United States of America

Wing-Pui Kong

Affiliation Vaccine Research Center, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health, Bethesda, Maryland, United States of America

Chih-Jen Wei

Affiliation Vaccine Research Center, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health, Bethesda, Maryland, United States of America

Neal Van Hoeven

Affiliation Influenza Division, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America

J. Patrick Gorres

Affiliation Vaccine Research Center, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health, Bethesda, Maryland, United States of America

Martha Nason

Affiliation Biostatistics Research Branch, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health, Bethesda, Maryland, United States of America

Hanne Andersen

Affiliation BIOQUAL, Inc., Rockville, Maryland, United States of America

Terrence M. Tumpey

Affiliation Influenza Division, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America

Gary J. Nabel

gnabel@nih.gov

Affiliation Vaccine Research Center, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health, Bethesda, Maryland, United States of America

Competing Interests

One of the authors, Hanne Anderson, works for a commercial company (BioQual, Inc) and performed some assays as a paid contractor. The study was entirely funded by National Institutes of Health (NIH).

Author Contributions

Conceived and designed the experiments: SSR GJN. Performed the experiments: WPK CJW NVH HA TMT. Analyzed the data: SSR WPK CJW JPG MN GJN. Contributed reagents/materials/analysis tools: TMT. Wrote the paper: SSR WPK CJW JPG HA TMT GJN.