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)





Anderson S-J, Garnett GP, Enstone J, et al., 2018, The importance of local epidemic conditions in monitoring progress towards HIV epidemic control in Kenya: a modelling study., J Int Aids Soc, Vol:21

Ghys PD, Williams BG, Over M, et al., 2018, Epidemiological metrics and benchmarks for a transition in the HIV epidemic, Plos Medicine, Vol:15, ISSN:1549-1676

Fu H, Lin H-H, Hallett TB, et al., 2018, Modelling the effect of discontinuing universal Bacillus Calmette-Guerin vaccination in an intermediate tuberculosis burden setting, Vaccine, Vol:36, ISSN:0264-410X, Pages:5902-5909

McGillen JB, Stover J, Klein DJ, et al., 2018, The emerging health impact of voluntary medical male circumcision in Zimbabwe: An evaluation using three epidemiological models, Plos One, Vol:13, ISSN:1932-6203

Olney JJ, Eaton JW, Braitstein P, et al., 2018, Optimal timing of HIV home-based counselling and testing rounds in Western Kenya, Journal of the International Aids Society, Vol:21, ISSN:1758-2652

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