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?




Thomas R, Skovdal M, Galizzi MM, et al., 2019, Improving risk perception and uptake of pre-exposure prophylaxis (PrEP) through interactive feedback-based counselling with and without community engagement in young women in Manicaland, East Zimbabwe: study protocol for a pilot randomized trial, Trials, Vol:20, ISSN:1745-6215

Moran M, Skovdal M, Mpandaguta E, et al., 2019, The temporalities of policymaking: The case of HIV test-and-treat policy adoption in Zimbabwe, Health & Place, ISSN:1353-8292

Schaefer R, Thomas R, Nyamukapa C, et al., 2019, Accuracy of HIV risk perception in east Zimbabwe 2003-2013, Aids and Behavior, Vol:23, ISSN:1090-7165, Pages:2199-2209

Marston M, Gregson S, 2019, HIV, ART and fertility in sub-Saharan Africa: pieces still missing in the jigsaw puzzle., J Infect Dis

Moorhouse L, Schaefer R, Thomas R, et al., 2019, Application of the HIV prevention cascade to identify, develop,and evaluate interventions to improve use of prevention methods:Examples from a study in east Zimbabwe, Journal of the International Aids Society, Vol:22, ISSN:1758-2652, Pages:86-92

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