About the Authors

Ben Lopman

*E-mail: Ben.Lopman@hpa.org.uk

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

Simon Gregson

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

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: BL SG. Performed the experiments: BL. Analyzed the data: BL. Contributed reagents/materials/analysis tools: BL SG. Wrote the paper: BL SG.