Are you happy or just a gay 20 percenter?

CHICAGO — One in five sexually active gay and bisexual men has the AIDS virus, and nearly half of those don't know they are infected, a federal study of 21 U.S. cities shows.

Experts said the findings are similar to earlier research, but the study released Thursday is the largest to look at gay and bisexual U.S. men at high risk for HIV. More than 8,000 men were tested and interviewed, and 44 percent of those who had the virus didn't know they had it.

Black men were more likely to have HIV, with 28 percent reportedly infected, compared to 18 percent of Hispanic men and 16 percent of white men.

Black men were also least likely to know they were infected — about 60 percent didn't know they had HIV — compared 46 percent of Hispanic men and 26 percent of whites.

http://www.msnbc.msn.com/id/39327072/ns/health-aids/