HIV in prisons.
D003140:Communicable Disease Control / Q000379:methods; D015658:HIV Infections / Q000453:epidemiology* / Q000635:transmission; D040261:Harm Reduction; D006801:Humans; D015995:Prevalence; D011329:Prisoners / Q000706:statistics & numerical data*; D011330:Prisons / Q000706:statistics & numerical data; D012307:Risk Factors; D015819:Substance Abuse, Intravenous / Q000453:epidemiology