Imperial College London


Faculty of MedicineSchool of Public Health

Professor of Global Health



+44 (0)20 7594 1150timothy.hallett




Norfolk PlaceSt Mary's Campus






I am based at the Department of Infectious Disease Epidemiology. My work with the Applied HIV Epidemiology research group centres on the development and application of mathematical models for interpreting surveillence data, analyzing control trials and planning interventions. The overall aim of this research is to come to conclusions about the optimal use of limited resources in the response to HIV epidemic worldwide. 


I direct the HIV Modelling Consortium, which is a network epidemiologists, mathematical modellers and health-economists. I also work with UNAIDS and the Reference Group on Estimates, Modelling and Projections in developing the methods for calculating international AIDS statistics.


I serve on the PEPFAR Scientific Advisory Board and am a member of the editorial board of PLoS Medicine 


I co-direct the MSc course in Epidemiology and lecture on the Department's short course on Infectious Disease Modelling. 


I am also an Affiliate Associate Professor at the University of Washington, Department of Global Health.




Estimating Incidence Spreadsheet (AIDS, 2010)

Child Mortality Bias Estimation Model (Bulletin WHO, 2010)





Cremin I, McKinnon L, Kimani J, et al., Including PrEP for key populations in combination HIV prevention: a mathematical modelling analysis of Nairobi as a case-study, Lancet Hiv, ISSN:2405-4704

Hallett TB, Over M, 2010, How to Pay “Cash-on-Delivery” for HIV Infections Averted: Two Measurement Approaches and Ten Payout Functions - Working Paper 210, Center for Global Development: Working Paper

Meyer-Rath G, McGillen JB, Cuadros DF, et al., 2018, Targeting the right interventions to the right people and places: the role of geospatial analysis in HIV program planning, Aids, Vol:32, ISSN:0269-9370, Pages:957-963

Hecht R, Hiebert L, Spearman WC, et al., 2018, The investment case for hepatitis B and C in South Africa: adaptation and innovation in policy analysis for disease program scale-up, Health Policy and Planning, Vol:33, ISSN:0268-1080, Pages:528-538

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

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