A new report in JMIR Public Health and Surveillance, authored by researchers at Emory University’s Rollins School of Public Health, provides state, city and county estimates of the rate of MSM living with HIV. According to the report, HIV prevalence among MSM in 2012 was 15 percent (i.e., 15 in 100 MSM were living with HIV infection), but rates vary dramatically by geographic area. This new information will help states better focus HIV prevention efforts within this population.