About the Authors

W. Katherine Yih

katherine_yih@hphc.org

Affiliation Department of Ambulatory Care and Prevention, Harvard Medical School and Harvard Pilgrim Health Care, Boston, Massachusetts, United States of America

Kathryn S. Teates

Current address: Department of Research and Health Sciences IT, Emory University, Atlanta, Georgia, United States of America

Affiliation Influenza Branch, Division of Viral and Rickettsial Diseases, National Center for Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America

Allyson Abrams

Affiliation Department of Ambulatory Care and Prevention, Harvard Medical School and Harvard Pilgrim Health Care, Boston, Massachusetts, United States of America

Ken Kleinman

Affiliation Department of Ambulatory Care and Prevention, Harvard Medical School and Harvard Pilgrim Health Care, Boston, Massachusetts, United States of America

Martin Kulldorff

Affiliation Department of Ambulatory Care and Prevention, Harvard Medical School and Harvard Pilgrim Health Care, Boston, Massachusetts, United States of America

Robert Pinner

Current address: Division of Emerging Infections and Surveillance Services, National Center for Preparedness, Detection and Control of Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America

Affiliation Office of Surveillance, National Center for Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America

Robert Harmon

Current address: Duval County Health Department, Jacksonville, Florida, United States of America

Affiliation Optum, a UnitedHealth Group company, Golden Valley, Minnesota, United States of America

Stanley Wang

Current address: New York City Department of Health and Mental Hygiene, New York City, New York, United States of America

Affiliation Influenza Branch, Division of Viral and Rickettsial Diseases, National Center for Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America

Richard Platt

Affiliation Department of Ambulatory Care and Prevention, Harvard Medical School and Harvard Pilgrim Health Care, Boston, Massachusetts, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: AA KK MK RP RP. Analyzed the data: AA. Contributed reagents/materials/analysis tools: KST SW. Wrote the paper: WKY KST. Contributed substantially to the interpretation of the data: WKY. Was the main author of the manuscript: WKY. Provided data: KST SW. Wrote pieces of the manuscript: KST. Contributed to the design of the study, conducted the analyses, and displayed the results graphically: AA. Critically reviewed the manuscript: AA RP RH SW. Was centrally involved in the design of the study and interpretation of the data and provided critical comments on the manuscript: KK MK. Contributed to the conception of the study: RP. Facilitated the acquisition of data: RP RH. Conceived of the study, was centrally involved in its design and in the interpretation of data, and provided critical comments on the manuscript: RP.