About the Authors

Hua Yang

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

Li-Mei Chen

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

Paul J. Carney

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

Ruben O. Donis

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

James Stevens

fwb4@cdc.gov

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: HY LMC PJC ROD JS. Performed the experiments: HY LMC PJC JS. Analyzed the data: HY LMC PJC ROD JS. Wrote the paper: HY LMC PJC ROD JS.