Trog, why are you using the term "Sub Saharan Africa" as a catch all descriptor for this epidemic? Lesotho's prevalence rate is 28% Somalia's is 0.5% Do you think it's fair to the NHS that you use the term "SSA" when Lesotho's prevalence rates is 60 times greater than Somalia's? Screening a Somali as much as a citizen of Lesotho? Don't you think you're not going to be getting a clear, cost effective picture while using SSA as your screening criteria when basically a quarter of people from Lesotho are HIV positive, while the same amount of Somalis as Italians are HIV positive?