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50,000 New HIV Infections Each Year in U.S.

New HIV Infections Rise 48% in Young Black Gay/Bi Men
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WebMD Health News
Reviewed by Laura J. Martin, MD

Aug. 3, 2011 -- Some 50,000 Americans are newly infected with HIV each year, the CDC estimates.

That's slightly fewer new infections than the CDC's last estimate of 56,300 for 2006. But that's due to improvement in the way CDC calculates new HIV infections, not to a drop in the spread of HIV in the U.S. 

Infection rates were stable from 2006 to 2009, the latest year included in CDC figures. 

"Not increasing is not good enough. The number of new HIV infections remains far too high," CDC Director Thomas Frieden, MD, said at a news teleconference held to announce the new numbers.

As of 2009, 61% of new HIV infections are in men who have sex with men. New infections from heterosexual contact make up 27% of the total, while new infections among users of intravenous drugs represent only 9%.

Here's why the HIV infection rate isn't going down: There's been a sharp increase in new infections among gay and bisexual men. From 2006 to 2009, new infections among young men who have sex with men are up 34%.

Even more striking is the 48% increase in new HIV infections among black gay and bisexual men ages 13 to 29.

"We are very concerned about that trend," Frieden said.

Why such a high rate among these young black men? Frieden noted that black gay/bi men do not have more individual risk factors than white gay/bi men.

"These black men have fewer sex partners, are less likely to use drugs when having sex, and are no more likely to report unprotected anal intercourse than white men," Frieden said. "We think it is other factors. Young black men have more sexually transmitted infections. Black men who have sex with men are also more likely to have undiagnosed infections. And there are other factors, such as limited access to health care and the stigma of homosexuality."

Most people who come down with HIV are infected by someone who doesn't know he or she is carrying the AIDS virus. The CDC estimates that 21% of people living with HIV don't know they're infected.

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