SIDA & VIH
United States Statistics by transmission route and gender
Around 48% of all people diagnosed with AIDS were probably infected with HIV through male-to-male sexual contact, while people exposed through heterosexual contact comprise around 17% total AIDS cases. Since the beginning of the epidemic, the number of heterosexual infections has increased dramatically. According to CDC estimates, heterosexual contact led to about one third of new AIDS diagnoses and one third of new HIV diagnoses in 2006.
Around one fifth of all adults and adolescents diagnosed with AIDS have been female, although among new AIDS diagnoses in 2007, this proportion was 27%. Of the 34 states with a history of confidential name-based reporting, 31% of HIV diagnoses in 2007 were attributed to women. Of these states, the HIV diagnosis rate in 2007 was higher for males (38.8 per 100,000 population) than females (12.9). This is reflected in 2007 AIDS diagnoses with the diagnosis rate for males (21.6 per 100,000 population) again being higher than that of females (7.5).
Of the estimated 9,209 children under 13 years of age who have been diagnosed with AIDS within the 50 states and the District of Columbia, 8,434 (92%) were probably infected with HIV through mother-to-child transmission. Most others were infected through receipt of blood, blood products or tissue. In 2007, 159 children were diagnosed with HIV, and 28 were diagnosed with AIDS.
Estimated adult and adolescent HIV diagnoses in 2007 by transmission route and gender (34 states only)
| Transmission route | Male | Female | Total |
|---|---|---|---|
| Male-to-male sexual contact | 22,472 | - | 22,472 |
| Injection drug use | 3,133 | 1,806 | 4,939 |
| Male-to-male sexual contact and injection drug use | 1,260 | - | 1,260 |
| High-risk heterosexual contact | 4,551 | 9,076 | 13,627 |
| Other/risk not identified | 102 | 96 | 198 |
| Total* | 31,518 | 10,977 | 35,180 |
* Because totals are calculated independently of the subpopulations, the values in each column may not sum exactly to the figure in the "Total" row
Estimated adult and adolescent AIDS diagnoses by transmission route and gender (50 states and D.C.)
| Transmission route | 2007 diagnoses | Cumulative diagnoses | ||||
|---|---|---|---|---|---|---|
| Male | Female | Total | Male | Female | Total | |
| Male-to-male sexual contact | 16,749 | - | 16,749 | 487,695 | - | 487,695 |
| Injection drug use | 3,750 | 2,260 |
6,010 |
175,704 | 80,155 | 255,859 |
| Male-to-male sexual contact and injection drug use | 1,664 | - | 1,664 |
71,242 | - | 71,242 |
| High-risk heterosexual contact | 4,011 | 7,100 | 11,111 | 63,927 | 112,230 | 176,157 |
| Other/risk not identified | 181 | 220 | 401 |
12,108 | 6,158 | 18,266 |
| Total* | 26,355 | 9,579 | 35,934 |
810,676 | 198,544 | 1,010,030 |
* Because totals are calculated independently of the subpopulations, the values in each column may not sum exactly to the figure in the "Total" row
See our AIDS statistics by race and age page for further information broken down by racial/ethnic group.
Notes
The latest statistics on AIDS & HIV in the USA were published in February 2009 by the US Centers for Disease Control and Prevention (CDC).
There is often a delay between the time of diagnosis of HIV or AIDS, or the time of death, and the time at which the event is reported. Moreover, this delay may differ among different categories of people. For this reason the CDC estimates the number of diagnoses, deaths and people living with HIV or AIDS by adjusting for reporting delays, taking into account the differences between categories. The CDC also redistributes cases into exposure categories if none was initially reported. No adjustment is made for incomplete reporting. On this page, all numbers are CDC estimates.
On this page "adults and adolescents" are defined as persons aged 13 years or more. The term "transmission route" refers to the most probable route of transmission of HIV infection. The term "male-to-male sexual contact" includes gay men, bisexual men and some men who consider themselves to be neither gay nor bisexual. The "high-risk heterosexual contact" category comprises persons who report specific heterosexual contact with a person with, or at high risk for, HIV infection (e.g., an injecting drug user). This does not include adults and adolescents born in, or who had sex with someone born in, a country where heterosexual transmission was believed to be the main mode of HIV transmission, unless they meet the criteria stated in the previous sentence.
The HIV statistics presented on this page include only the 34 states with a history of confidential name-based HIV reporting, as listed in our USA AIDS Statistics Summary. The AIDS statistics include all 50 states and the District of Columbia.
