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)





Stopard IJ, Hauck K, Hallett TB, 2019, The influence of constraints on the efficient allocation of resources for HIV prevention: authors' response., Aids, Vol:33, Pages:1950-1951

Case K, Gomez G, Hallett T, The impact, cost and cost-effectiveness of oral pre-exposure prophylaxis in sub-Saharan Africa: a scoping review of modelling contributions and way forward, Journal of the International Aids Society, ISSN:1758-2652

Haacker M, Hallett T, Atun R, On discount rates for economic evaluations in global health, Health Policy and Planning, ISSN:0268-1080

Cooke GS, Hallett TB, 2019, Pricing viral hepatitis as part of universal health coverage, The Lancet Global Health, ISSN:2214-109X

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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