The number of new infections in the country has remained stable at about 50,000 per year over the last decade.
For first time the number of new infections amongst African-American women has declined . Young gay men saw an increase of 22 percent from 2008 to 2010.
Untreated or ineffectively treated HIV can lead to AIDS.
The 2010 data was published online in the CDC's HIV supplemental surveillance report.
