Dr Timothy Hallett

 

I am based at the Department of Infectious Disease Epidemiology and the Institute for Global Health. My work 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.

    We have developed techniques to understand how to infer whether prevalence declines are driven by behaviour change and to estimate recent incidence rates from cross-sectional prevalence data. We have also explored the theoretical impact of several interventions, including reducing cross-generational sex, delaying age at sexual debut, behaviour change following voluntary counselling and testing, the impact of widespread male circumcision and the potential impact of treatment ('treatment for prevention').

    This work has been done in collaboration with a number of partners including, UNAIDS, the Ministry of Health and Child Welfare in Zimbabwe and the Centers for Disease Control and Prevention.

I direct and teach on the professional development course, "Introduction to Mathematical Models of the Epidemiology & Control of Infectious Diseases", that runs for two weeks in September each year.
 

Resources:

Estimating Incidence Spreadsheet (AIDS, 2010)

Child Mortality Bias Estimation Model (Bulletin WHO, 2010)