Method of Infection, AIDS Diagnoses 2008-2011
"From 2008 through 2011, the annual number of infections classified as stage 3 (AIDS) among adult and adolescent males with HIV infection attributed to male-to-male sexual contact increased. The numbers of stage 3 (AIDS) classifications among males with infection attributed to injection drug use, to male-to-male sexual contact and injection drug use, and to heterosexual contact decreased. The number of infections classified as stage 3 (AIDS) among adult and adolescent females with HIV infection attributed to injection drug use decreased; the number with infection attributed to heterosexual contact remained stable."
Centers for Disease Control and Prevention. HIV Surveillance Report, 2011, "Rates of diagnoses of HIV infection among adults and adolescents, by area of residence, 2011—United States and 6 dependent areas"; Vol. 23, p. 7. Published February 2013. Accessed May 21, 2013.