title: Region shows how an effective program works. Mbeya region has declining trend of HIV.
mesh_terms: D000293:Adolescent; D000328:Adult; D015658:HIV Infections / Q000453:epidemiology / Q000517:prevention & control*; D015528:HIV Seroprevalence / Q000639:trends*; D006801:Humans; D008875:Middle Aged; D015397:Program Evaluation; D013636:Tanzania / Q000453:epidemiology