Imperial College London


Faculty of MedicineSchool of Public Health

Professor in Demography and Behavioural Science



+44 (0)20 7594 3279s.gregson




LG27Praed StreetSt Mary's Campus





Simon Gregson is a demographer working on the dynamics of spread, impact and control of HIV epidemics in sub-Saharan Africa. His work combines empirical studies including large-scale, longitudinal, population-based and clinical surveys with use of mathematical models. Simon is Director of the Manicaland HIV/STD Prevention Project in Zimbabwe.

Video (below)

Why did HIV decline in Zimbabwe?

The unique, population-based Manicaland study tracks the Zimbabwean HIV epidemic over 19 years. Professor Simon Gregson delivers his inaugural lecture. Recorded at Imperial College London on 08 Jun 2011.

Why did HIV decline in Zimbabwe?




Risher K, Cori A, Reniers G, et al., 2021, Age patterns of HIV incidence in eastern and southern Africa: a collaborative analysis of observational general population cohort studies, The Lancet Hiv, Vol:8, ISSN:2405-4704, Pages:e429-e439

Wolock T, Flaxman S, Risher K, et al., 2021, Evaluating distributional regression strategies for modelling self-reported sexual age-mixing, Elife, ISSN:2050-084X

Davis K, Perez Guzman P, Hoyer A, et al., 2021, Association between HIV infection and hypertension: a global systematic review and meta-analysis of cross-sectional studies, Bmc Medicine, Vol:19, ISSN:1741-7015

Goodwin T, Gregson S, Maswera R, et al., 2021, Understanding the determinants and consequences of HIV status disclosure in Manicaland, Zimbabwe: cross-sectional and prospective analyses, Aids Care: Psychological and Socio-medical Aspects of Aids-hiv, ISSN:0954-0121

Gregson S, Moorhouse L, Dadirai T, et al., 2021, Comprehensive investigation of sources of misclassification errors in routine HIV testing in Zimbabwe, Journal of the International Aids Society, Vol:24, ISSN:1758-2652

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