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How many people have HIV/AIDS?

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According to the most recent estimates from the World Health Organization (WHO) and the Joint United Nations Programme on HIV/AIDS, 34 million people around the world had HIV in 2010. About one-half were women, and one-tenth were children younger than age 15.

The National Institute of Allergy and Infectious Diseases has more information on understanding HIV/AIDS.

In the United States

The most recent data from the Centers for Disease Control and Prevention (CDC) show that 1,148,200 Americans aged 13 and older were living with HIV in 2009 .1 Of these:

  • 279 ,100 were female1
  • 76 ,4 00 were youths age 13 to 241
  • About 473,000 had AIDS the disease, not just the virus

About 18% of those infected with HIV in the United States are unaware of their infection.2 Young adults ages 25 to 34 accounted for 28% of new HIV infections in the United States in 2011, and young people 13 to 24 years old accounted for 21 %.2 That year, women accounted for an estimated 10,512—or 21%—of the estimated 50,199 new HIV cases in the United States.2

The CDC collects statistics about HIV/AIDS in the United States, including the number of new infections and the number of infections in different groups. Visit the CDC's website for more statistics about HIV/AIDS in the United States.

Among Women, Youth, and Children

Globally, women represent about half of people with HIV, according to the WHO. This proportion is higher in some parts of the world, such as sub-Saharan Africa, where 60% of those infected are female.

In the United States, women make up almost one-quarter of those with HIV, according to the CDC. Some American women are at greater risk of HIV infection than others. Black women are more than 16 times more likely than white women to become infected with HIV, for example. Visit the CDC's website for more statistics about HIV/AIDS and women.

In the United States, an estimated 9,000 young people ages 13 to 24 became infected with HIV in 2011, the most recent year for which there are CDC data. 2 Among American youth, gay and bisexual males and black males have especially high rates of HIV infection. Visit the CDC's website for more information about understanding HIV/AIDS.

In 2011, fewer than 200 children younger than age 13 were newly diagnosed with HIV in the United States and its territories, according to the CDC. 2 The rates of HIV infection among infants have dropped dramatically in the United States because anti-HIV drugs are available to block transmission of the virus at birth. In many low- and middle-income countries, however, this testing and treatment is not routine and often is not accessible. Contraceptive use in these countries is also less common than in the United States. As a result, 3 30,000 children around the world became infected with HIV from their mothers in 2011, according to WHO.3

  1. Centers for Disease Control and Prevention. (2012). Monitoring selected national HIV prevention and care objectives by using HIV surveillance data—United States and 6 U.S. dependent areas. 2010 Surveillance Supplemental Report, 17(3, Pt. A). Retrieved on May 20, 2013, from (PDF - 539 KB) [top]
  2. Centers for Disease Control and Prevention. (2013). HIV Surveillance Report, 2011; vol. 23. Retrieved May 20, 2013, from [top]
  3. WHO. (2011). Global HIV/AIDS response: epidemic update and health sector progress towards universal access: progress report 2011. Retrieved April 24, 2012, from External Web Site Policy (PDF - 3.35 MB), p. 11. [top]

Last Reviewed: 06/04/2013
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