About the Authors

Zoe Moodie

zoe@fredhutch.org

Affiliation Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America

Barbara Metch

Affiliation Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America

Linda-Gail Bekker

Affiliation Desmond Tutu HIV Foundation, University of Cape Town, Cape Town, South Africa

Gavin Churchyard

Affiliations Aurum Institute for Health Research, Johannesburg, South Africa, School of Public Health, University of Witwatersrand, Johannesburg, South Africa, London School of Hygiene and Tropical Medicine, London, United Kingdom

Maphoshane Nchabeleng

Affiliation Mecru Clinical Research Unit, Sefako Makgatho Health Sciences University, Pretoria, South Africa

Koleka Mlisana

Affiliation School of Laboratory Medicine and Medical Sciences, University of KwaZulu-Natal and National Health Laboratory Service, Durban, South Africa

Fatima Laher

Affiliation Perinatal HIV Research Unit, Faculty of Health Sciences, University of Witwatersrand, Johannesburg, South Africa

Surita Roux

Affiliation Desmond Tutu HIV Foundation, University of Cape Town, Cape Town, South Africa

Kathryn Mngadi

Affiliations Centre for the AIDS Programme of Research in South Africa (CAPRISA), Durban, South Africa, School of Laboratory Medicine and Medical Sciences, University of KwaZulu-Natal and National Health Laboratory Service, Durban, South Africa

Craig Innes

Affiliation Aurum Institute Clinical Research Site, Klerksdorp, South Africa

Matsontso Mathebula

Affiliation Mecru Clinical Research Unit, Sefako Makgatho Health Sciences University, Pretoria, South Africa

Mary Allen

Affiliation Vaccine Research Program, Division of AIDS, NIAID, NIH, Rockville, United States of America

Carter Bentley

Affiliation Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America

Peter B. Gilbert

Affiliation Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America

Michael Robertson

Affiliation Merck Research Laboratories, West Point, Pennsylvania, United States of America

James Kublin

Affiliation Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America

Lawrence Corey

Affiliation Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America

Glenda E. Gray

Affiliations Perinatal HIV Research Unit, Faculty of Health Sciences, University of Witwatersrand, Johannesburg, South Africa, South African Medical Research Council, Cape Town, South Africa

Competing Interests

The authors have read the journal's policy and the authors of this manuscript have the following competing interests: MA is employed by the National Institute of Allergy and Infectious Diseases (NIAID), the study sponsor. All authors are current recipients of NIAID funding, and this publication is a result of activities funded by NIAID. MA was not involved with the process of funding these awards, nor in their administration or scientific aspects, and, in accordance with NIAID policies, is deferred from decisions regarding funding of coauthors for a requisite period. This study was also partly funded by Merck and Co Inc. Michael Robertson is an employee of and owns stock in Merck Research Laboratories. There are no patents, products in development or marketed products to declare. This does not alter the authors' adherence to all the PLOS ONE policies on sharing data and materials, as detailed online in the guide for authors.

Author Contributions

Conceived and designed the experiments: ZM BM LGB GC MN K. Mngadi FL SR K. Mlisana CI MM MA CB PBG MR JK LC GEG. Performed the experiments: ZM BM LGB GC MN K. Mngadi FL SR K. Mlisana CI MM MA CB PBG MR JK LC GEG. Analyzed the data: ZM BM. Wrote the paper: ZM BM MA GEG JK LC CB.