Dr. Gregson will manage and co-ordinate the proposed research project with expert epidemiological and statistical support from the Blair Research Institute in Harare and the Wellcome Trust Centre for the Epidemiology of Infectious Disease, at Oxford University (Dr. Chandiwana, Professor Anderson, Dr. Garnett and Dr. Donnelly), social psychology and ethnographic support from BRTI, the London School of Economics and the University of Natal (Mr. Tom Zhuwau, Dr. Cathy Campbell, Professor Eleanor Preston-Whyte and Professor Linda Richter), and biomedical support from BRTI (Professor Mason and Mr. Ocean Tobaiwa). Within the team we have considerable management and administrative as well as research experience and in a previous project we demonstrated the ability to develop and conduct a successful fieldwork-based scientific research project, given the level of technical and logistical support envisaged in this proposal. Zimbabwe has a good supply of well-qualified personnel in most disciplines and staff with appropriate sociological, demographic and/or medical expertise will be recruited. All staff will be given in-depth training in the specific requirements of the study. A summary schedule of project activities over time is attached.