About the Authors

Samuel S. Shepard

vfn4@cdc.gov (SSS); rvd6@cdc.gov (ROD)

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

C. Todd Davis

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

Justin Bahl

Affiliations Laboratory of Virus Evolution in Program of Emerging Infectious Diseases, Duke-NUS Graduate Medical School, Singapore, Singapore, Center for Infectious Diseases, The University of Texas School of Public Health, Houston, Texas, United States of America

Pierre Rivailler

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

Ian A. York

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

Ruben O. Donis

vfn4@cdc.gov (SSS); rvd6@cdc.gov (ROD)

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

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JB ROD SSS. Performed the experiments: SSS. Analyzed the data: CTD IAY JB SSS. Contributed reagents/materials/analysis tools: PR SSS. Wrote the paper: ROD IAY PR JB CTD SSS.