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?




Rhead R, Elmes J, Otobo E, et al., 2018, Do female sex workers have lower uptake of HIV treatment services than non-sex workers? A cross-sectional study from east Zimbabwe, Bmj Open, Vol:8, ISSN:2044-6055

Tlhajoane M, Eaton JW, Takaruza A, et al., 2018, Prevalence and Associations of Psychological Distress, HIV Infection and HIV Care Service Utilization in East Zimbabwe, Aids and Behavior, Vol:22, ISSN:1090-7165, Pages:1485-1495

Smit M, Olney J, Ford NP, et al., 2018, The growing burden of noncommunicable disease among persons living with HIV in Zimbabwe, Aids, Vol:32, ISSN:0269-9370, Pages:773-782

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

Schaefer R, Gregson S, Eaton JW, et al., 2017, Age-disparate relationships and HIV incidence in adolescent girls and young women: evidence from Zimbabwe, Aids, Vol:31, ISSN:0269-9370, Pages:1461-1470

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