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?




Chang A, Maswera R, Moorhouse L, et al., 2021, The determinants and impacts of age-disparate relationships on women in Zimbabwe: A life course perspective, Social Science and Medicine – Population Health, ISSN:2352-8273

Tlhajoane M, Dzamatira F, Kadzura N, et al., 2021, Incidence and predictors of attrition among patients receiving ART in eastern Zimbabwe before, and after the introduction of universal ‘treat-all’ policies: A competing risk analysis, Plos Global Public Health, Vol:1, Pages:e0000006-e0000006

Davis K, Perez-Guzman P, Hoyer A, et al., 2021, Correction to: Association between HIV infection and hypertension: a global systematic review and meta-analysis of cross-sectional studies., Bmc Medicine, Vol:19, ISSN:1741-7015, Pages:228-228

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, Vol:10, ISSN:2050-084X, Pages:1-38

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