The overall HIV prevalence was 17.4% (93/536); however, there was significant variation of HIV prevalence with increasing age (Table 4). The HIV prevalence among those between the age of 18 and 23 was 8.3% (20/241), then 20.0% (42/210) among those 24–29, and 35.7% (30/84) among those older than 30. Overall, 23.7% (22/93) were aware of their HIV status, though this varied significantly between countries (p,0.05). In Malawi, more than 95% were unaware of their status, whereas in Botswana 76.3% were unaware and in Namibia, 41.8% were unaware of their status.