Across all ethnicities, in the U.S. the group most affected by HIV infection is gay and bisexual men and other men who have anal sex with men (but for some reason don’t identify as gay or bi, dubbed MSM). Transgender women, especially women of color, are at a significantly higher risk as well, though exact numbers aren’t known because in many studies they are included, erroneously, in the MSM category. Black and Latino men and women and injection drug users have higher risk rates, but of course anyone (straight, gay, black, white, whatever) who has condomless anal or vaginal sex is at risk.