... [4,5] In countries worst affected by HIV, monitoring HIV prevalence trends in the general population is a challenge Repeated national population surveys, which can be used to construct trends in prevalence ... Monitoring trends in HIV prevalence among young people, aged 15 to 24 years, in Manicaland, Zimbabwe Journal of the International AIDS Society 2011 14:27 Submit your next manuscript to BioMed Central ... study findings are considered further in the discussion In the ANC survey, all data from women aged 15 to 24 years seen at the 22 ANC clinics participating in all three surveillance rounds were included...