ProfessorTimothy Hallett

I am Professor of Global Health in the School of Public Health at Imperial College London. I am also an Associate Director of the MRC Centre for Global Infectious Disease Analysis and an Affiliate Professor at the Department of Global Health, University of Washington, Seattle.

I founded the HIV Modelling Consortium — the first disease modelling consortium of its type — and directed it between 2010 and 2019. During this time, the consortium contributed evidence to the US FDA on the approval of oral PrEP, pioneered the use of modelling and economic evaluations in the development of WHO guidelines (and contributed evidence in support of eligibility criteria for starting antiretroviral treatment to be expanded), and contributed to international policy setting with PEPFAR and the Global Fund and national policy making in many countries.

I have also served as the chair of the UNAIDS Reference Group on Estimates, Modelling and Projections (2012-2018). This group creates the method used by all countries to track the HIV epidemic, and innovations made by the group during the time included making estimates more spatially specific and increasing the use of routinely available data.

My work on hepatitis underpinned the WHO strategy for combatting HBV and HCV globally. In China, our work contributed to policy changes that enabled treatment to be expanded vastly.

Since 2016, I have served as the chair of the Modelling Guidance Group of the Global Fund. This group undertakes and oversees all the modelling and analytical work produced by the Global Fund. In that role I have led the development of four 'Investment Cases' for Global Fund replenishment and presented these to donors: the total amount raised during this period was almost US$43 billion.

In 2019, I started developing a new type of analytic approach for health systems whereby the whole healthcare system and all healthcare needs in a population are modelled simultaneously. This approach has been used extensively in Malawi, where it has contributed insights into optimal health benefits packages and the impact of health system strengthening, in particular.

I have been an advisor to the World Health Organisation, the Gates Foundation, the World Bank and the Infected Blood Inquiry (UK). I have served on Scientific and Strategic Advisory boards for PEPFAR, WHO, UNAIDS and many research projects (NTD Modelling Consortium, MESH Consortium, Diagnostics Modelling Consortium). I have also worked with pharmaceutical companies, private philanthropists, and consulting firms in the UK, US and Europe.

This work has formed the basis of Impact Case Studies in the both rounds of the Research Excellence Framework (2014 and 2021).

I have written articles for national newspapers (The Times, Independent,  Mirror and Daily Express), popular news/politics outlets (including Poltiics Home and the Huffington Post) and have contributed on many occcasions to live news and science coverage (BBC, NPR, LBC radio and Times Radio).

In 2020, I was elected to the fellowship of the Academy of Medical Sciences.