New data from the US Centers for Disease Control and Prevention (CDC) show that gay, bisexual, and other men who have sex with men (MSM) are over 44 times more likely than other men to contract HIV, and over 40 times more likely than women to contract HIV. Further, MSM are over 46 times more likely to contract syphilis than other men, and over 71 times more likely than women to contract syphilis.

According to the CDC, MSM comprised 57% of people newly infected with HIV in the US in 2006, even though MSM are only 2% of the adult population.