About the Authors

Martin O. C. Ota

mota@mrc.gm

Affiliation Medical Research Council Unit, Banjul, The Gambia

Anna Roca

Affiliations Medical Research Council Unit, Banjul, The Gambia, Barcelona Center for International Health Research (CRESIB), Institut d’Investigacions Biomediques August Pi i Sunyer, Universitat de Barcelona, Barcelona, Spain

Christian Bottomley

Affiliation MRC Tropical Epidemiology Group, London School of Hygiene and Tropical Medicine, London, United Kingdom

Philip C. Hill

Affiliations Medical Research Council Unit, Banjul, The Gambia, Centre for International Health, School of Medicine, University of Otago, Dunedin, New Zealand

Uzochukwu Egere

Affiliation Medical Research Council Unit, Banjul, The Gambia

Brian Greenwood

Affiliation Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, United Kingdom

Richard A. Adegbola

Affiliations Medical Research Council Unit, Banjul, The Gambia, GlaxoSmithKline Biologicals, Wavre, Belgium

Competing Interests

PH is a co-author of this manuscript as well as a PLoS ONE Editorial Board member. This does not alter the authors’ adherence to all the PLoS ONE policies on sharing data and materials. The study vaccines were donated by Wyeth Lederle Vaccines (Pfizer). Their provision of these study vaccines does not alter the authors’ adherence to all the PLoS ONE policies on sharing data and materials. One of the authors of this manuscript (RA) has a current address of GlaxoSmithKline Biologicals. This author was at the Medical Research Council Unit The Gambia at the time this study was conducted. Therefore, his current affiliation does not alter the authors’ adherence to all the PLoS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: MOO PH CB BG RA. Performed the experiments: MOO PH UE AR. Analyzed the data: MOO AR CB. Contributed reagents/materials/analysis tools: MOO CB AR RA. Wrote the paper: MOO AR PH UE CB BG RA.