About the Authors

David K. Shay

david.shay@cdc.hhs.gov

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

Benjamin J. Ridenhour

Affiliation Influenza Division, United States 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

ICMJE criteria for authorship read and met: DKS BJR. Wrote the first draft of the paper: DKS. Contributed to the writing of the paper: DKS BJR.