About the Authors

Timothy B Hallett, Simon Gregson, Sabada Dube, Geoff P Garnett
Department of Infectious Disease Epidemiology, Imperial College London, United Kingdom

Simon Gregson
Biomedical Research and Training Institute, Harare, Zimbabwe

Corresponding Author


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.