About the Authors

Yuan Li

liyuan@hsph.harvard.edu

Affiliation Department of Epidemiology and Department of Immunology & Infectious Diseases, Harvard School of Public Health, Boston, Massachusetts, United States of America

Claudette M. Thompson

Affiliation Department of Epidemiology and Department of Immunology & Infectious Diseases, Harvard School of Public Health, Boston, Massachusetts, United States of America

Marc Lipsitch

Affiliation Department of Epidemiology and Department of Immunology & Infectious Diseases, Harvard School of Public Health, Boston, Massachusetts, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: YL ML. Performed the experiments: YL CT. Analyzed the data: YL CT ML. Contributed reagents/materials/analysis tools: YL CT. Contributed to the writing of the manuscript: YL ML.