About the Authors

Timothy B Hallett

To whom correspondence should be addressed. E-mail: timothy.hallett@imperial.ac.uk

Affiliation Department of Infectious Disease Epidemiology, Imperial College London, United Kingdom

Simon Gregson

Affiliations Department of Infectious Disease Epidemiology, Imperial College London, United Kingdom , Biomedical Research and Training Institute, Harare, Zimbabwe

Sabada Dube

Affiliation Department of Infectious Disease Epidemiology, Imperial College London, United Kingdom

Geoff P Garnett

Affiliation Department of Infectious Disease Epidemiology, Imperial College London, United Kingdom

Competing Interests

SG owns shares in GlaxoSmithKline and Astra Zeneca. The other authors declare that they have are no competing interests.

Author Contributions

All authors helped design the study, analyse the results, and write the paper.