About the Authors

Jonathan F. Mosser

Affiliation Center for American Indian Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, United States of America

Lindsay R. Grant

lgrant@jhsph.edu (LRG); klobrien@jhsph.edu (KLO)

Affiliation Center for American Indian Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, United States of America

Eugene V. Millar

Affiliation Infectious Disease Clinical Research Program, Uniformed Services University of the Health Sciences, Bethesda, Maryland, United States of America

Robert C. Weatherholtz

Affiliation Center for American Indian Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, United States of America

Delois M. Jackson

Affiliation Division of Bacterial Diseases, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America

Bernard Beall

Affiliation Division of Bacterial Diseases, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America

Mariddie J. Craig

Affiliation White Mountain Apache Tribe, Whiteriver, Arizona, United States of America

Raymond Reid

Affiliation Center for American Indian Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, United States of America

Mathuram Santosham

Affiliation Center for American Indian Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, United States of America

Katherine L. O'Brien

lgrant@jhsph.edu (LRG); klobrien@jhsph.edu (KLO)

Affiliation Center for American Indian Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, United States of America

Competing Interests

The authors have read the journal's policy and have the following potential conflicts to report: KLOB, LG, RW, RR, MS have received in the past year research grant support from Pfizer and GlaxoSmithKline (GSK). KLOB and MS have served on external expert committees for Sanofi-Pasteur, GSK and Merck. Co-author Bernard Beall is a PLOS ONE Editorial Board member. The authors confirm that their declarations in the conflict of interest section do not alter adherence to all PLOS ONE policies on data sharing and materials. All other authors have no conflicts to report.

Author Contributions

Conceived and designed the experiments: KLO EVM RCW LRG MS RR. Performed the experiments: DMJ MJC. Analyzed the data: JFM. Contributed reagents/materials/analysis tools: BB. Wrote the paper: JFM LRG KLO.