Prevalence of HIV-1 infection in Zanzibar: results from a national HIV-1 serosurvey 2002.

Objective: To determine the prevalence of HIV-1 infection in Pemba and Zanzibar islands

Methods: We used an interviewer-administered questionnaire that consisted of pre-coded and open-ended questions consisting of 29 items. The questionnaire was developed in English and translated into Swahili language before use. The questionnaire was pilot tested and modified before use.