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?




Case KK, Gregson S, Mahy M, et al., 2017, Editorial: methodological developments in the Joint United Nations Programme on HIV/AIDS estimates, Aids, Vol:31, ISSN:0269-9370, Pages:S1-S4

Eaton JW, Johnson CC, Gregson S, 2017, The Cost of Not Retesting: Human Immunodeficiency Virus Misdiagnosis in the Antiretroviral Therapy "Test-and-Offer" Era, Clinical Infectious Diseases, Vol:65, ISSN:1058-4838, Pages:522-525

Elmes J, Skovdal M, Nhongo K, et al., 2017, A reconfiguration of the sex trade: How social and structural changes in eastern Zimbabwe left women involved in sex work and transactional sex more vulnerable, Plos One, Vol:12, ISSN:1932-6203

Gregson S, Mugurungi O, Eaton J, et al., 2017, Documenting and explaining the HIV decline in east Zimbabwe: the Manicaland General Population Cohort., Bmj Open, Vol:7

Mangal TD, 2017, Joint estimation of CD4(+) cell progression and survival in untreated individuals with HIV-1 infection, Aids, Vol:31, ISSN:0269-9370, Pages:1073-1082

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