Subsidiary aims include validation of innovative methods for data collection on HIV, other STDs - ie: using saliva samples [35] - and sexual behaviour in rural settings (all subject to final pre-test in the pilot study) and for estimating HIV incidence from cross-sectional prevalence data [27]; evaluation of antenatal clinic data as a source of information on HIV levels within the general population; and development of methods for routine evaluation of community-owned support programmes for individuals and families affected by heightened experience of chronic morbidity and mortality.