HIV Prevalence in Local Jails by Drug Use History
"The percentage of jail inmates reporting that they were HIV positive varied by level of prior drug use. Of jail inmates who reported never using drugs, 0.4% were HIV positive. An estimated 1.5% of inmates who had ever used drugs, 1.5% of those who used drugs in the month before their current offense, 3.2% of those who had used a needle to inject drugs, and 7.5% of those who had shared a needle reported being HIV positive."
Maruschak, Laura M. "HIV In Prisons and Jails, 2002," NCJ-205333 (Washington, DC: Department of Justice, Bureau of Justice Statistics, Dec. 2004), p. 9.