Jan. 29, 2008 -- The CDC today reported that about one-half of 1% of U.S. adults younger than 50 have HIV.
The CDC's HIV prevalence statistics are based on nearly 12,000 adults aged 18-49 who took part in national health studies from 1999 to 2006.
Participants were interviewed and provided blood samples; 0.47% had HIV infection. That's similar to findings from a 1988-1994 survey, states a CDC news release.
HIV infection was more common among men than women, and among African-Americans than whites or Mexican-Americans.
About 2.6% of African-American men and 1.5% of African-American women were HIV positive.
The data don't show how people contracted HIV.
The findings appear in January's edition of the CDC's NCHS Data Brief.