Statistics Overview

• Diagnosis of HIV infection: The term refers to persons diagnosed with HIV infection, regardless of the stage of disease at diagnosis (i.e., HIV infection Stage 1, 2, 3 [AIDS], or unknown), from 50 states, the District of Columbia, and 6 U.S. dependent areas.
• HIV infection, stage 3 (AIDS):The term refers specifically to persons with diagnosed HIV whose infection was ever classified as stage 3 (AIDS), based on CDC’s 2008 revised surveillance case definitions for adults, adolescents, and children.
• 6 U.S. dependent areas included in the data: American Samoa, Guam, the Northern Mariana Islands, Puerto Rico, the Republic of Palau, and the U.S. Virgin Islands.
• Transmission category: The term for summarizing the multiple risk factors that a person may have had by selecting the one most likely to have resulted in HIV transmission. For surveillance purposes, persons with more than one reported risk factor for HIV infection are classified in the transmission category listed first in a hierarchy of transmission categories, and therefore counted only once. The exception is men who had sexual contact with other men and injected drugs; this group makes up a separate transmission category.
• HIV incidence: The estimated number of persons newly infected with HIV during a specified time period (e.g., a year).
• HIV prevalence: The number of persons living with HIV at a given time regardless of the time of infection, whether the person has received a diagnosis (aware of infection), or the stage of HIV disease.

For more definitions and details about how HIV infection and AIDS data are tabulated, read the "Technical Notes" from the HIV Surveillance Report: Diagnoses of HIV Infection and AIDS in the United States and Dependent Areas, 2013.

For additional details on HIV disease surveillance, view the Kaiser Family Foundation tutorial: Understanding HIV/AIDS Surveillance Data in the United States.

Prevalence is the number of people living with HIV infection at a given time, such as at the end of a given year.

At the end of 2012, an estimated 1.2 million persons aged 13 and older were living with HIV infection in the United States, including 156,300 (12.8%) persons whose infections had not been diagnosed.^a

^aCDC. Prevalence of Diagnosed and Undiagnosed HIV Infection — United States, 2008–2012. MMWR 2015; 64:657-662

Incidence is the number of new HIV infections that occur during a given year. CDC estimates that approximately 50,000 people in the United States are newly infected with HIV each year. In 2010 (the most recent year that data are available), there were an estimated 47,500 new HIV infections.^a Nearly two thirds of these new infections occurred in gay and bisexual men. Black/African American men and women were also highly affected and were estimated to have an HIV incidence rate that was almost 8 times as high as the incidence rate among whites. Visit the HIV incidence page for more details.

^aCDC. Estimated HIV incidence among adults and adolescents in the United States, 2007-2010. HIV Supplemental Report 2012). Available at http://www.cdc.gov/hiv/library/slideSets/index.html.

Incidence Infographic

The infographic New HIV Infections in the United States, 2010, is based on incidence numbers from: Estimated HIV incidence among adults and adolescents in the United States, 2007–2010. HIV Surveillance Supplemental Report 2012;17(4).

In 2013, the estimated number of diagnoses of HIV infection in the United States was 47,352. There were 37,887 diagnoses in adult and adolescent males and 9,278 in adult and adolescent females. There were an estimated 187 diagnoses of HIV infection among children aged less than 13 years at diagnosis.

In 2013, the estimated number of diagnoses of HIV infection in the United States, by age at diagnosis, was as follows:

CDC tracks diagnoses of HIV infection information on seven racial and ethnic groups: American Indian/Alaska Native, Asian, black/African American, Hispanic/Latino, Native Hawaiian/other Pacific Islander, white, and multiple races.

In 2013, the estimated number of diagnoses of HIV infection in the United States was as follows:

^aHispanics/Latinos can be of any race.

For more details on HIV infection and race/ethnicity, see CDC's Populations and Surveillance fact sheets.

Six common transmission categories are male-to-male sexual contact, injection drug use, male-to-male sexual contact and injection drug use, heterosexual contact, mother-to-child (perinatal) transmission, and other (includes blood transfusions and unknown cause).

The distribution of the estimated number of diagnoses of HIV infection among adults and adolescents in the United States by transmission category follows. A breakdown by sex is provided where appropriate.

^aHeterosexual contact with a person known to have, or to be at high risk for, HIV infection.
^bIncludes hemophilia, blood transfusion, perinatal exposure, and risk factor not reported or not identified.

The distribution of the estimated number of diagnoses of HIV infection among children aged less than 13 years at the time of diagnosis in the United States, by transmission category, follows:

^aIncludes hemophilia, blood transfusion, and risk factor not reported or not identified.

These are the 10 states or dependent areas reporting the highest number of HIV diagnoses in 2013:

At the end of 2012, there were an estimated 914,826 persons living with diagnosed HIV infection in the United States.

Data include persons with a diagnosis of HIV infection regardless of the stage of disease at diagnosis. Estimated numbers resulted from statistical adjustment that accounted for delays in reporting to the health department (but not for incomplete reporting) and missing transmission category, where appropriate.

Because of delays in reporting of deaths, death and prevalence data are only available through the end of 2012. The exclusion of data from the most recent year allows at least 18 months for deaths to be reported and for these persons to be removed from calculations of persons living with diagnosed HIV infection.

Totals include persons of unknown race/ethnicity. Because totals for the estimated numbers were calculated independently of the values for the subpopulations, the subpopulation values may not equal these totals.

In 2013, the estimated number of persons with diagnosed HIV infection classified as stage 3 (AIDS) in the United States was 26,688. Of these, 20,256 stage 3 (AIDS) classifications were among adult and adolescent males, 6,424 were among adult and adolescent females, and 8 were among children aged less than 13 years.

The cumulative estimated number of persons with diagnosed HIV infection ever classified as stage 3 (AIDS) through 2012 in the United States was 1,194,039.

Estimated numbers resulted from statistical adjustment that accounted for delays in reporting to the health department (but not for incomplete reporting) and missing transmission category, where appropriate.

Cumulative totals include persons of unknown race/ethnicity. Because totals for the estimated numbers were calculated independently of the values for the subpopulations, the subpopulation values may not equal these totals.

In 2013, the estimated number of stage 3 (AIDS) classifications in the 50 states and the District of Columbia, by distribution of ages at time of classification, was as follows:

CDC tracks AIDS information on seven racial and ethnic groups: American Indian/Alaska Native, Asian, black/African American, Hispanic/Latino, Native Hawaiian/other Pacific Islander, white, and multiple races.

In 2013, the estimated number of persons with diagnosed HIV infection ever classified as stage 3 (AIDS) in the United States, by race or ethnicity was as follows:

^aFrom the beginning of the epidemic through 2013.
^bIncludes Asian/Pacific Islander legacy cases.
^cHispanics/Latinos can be of any race.

For more details on AIDS and race/ethnicity, see CDC's fact sheets.

CDC collects HIV and stage 3 (AIDS) data using six common transmission categories: male-to-male sexual contact, injection drug use, male-to-male sexual contact and injection drug use, heterosexual contact, mother-to-child (perinatal) transmission, and other (includes blood transfusions and unknown cause).

The distribution of the estimated number of persons with HIV infection ever classified as stage 3 (AIDS) among adults and adolescents in the United States, by transmission category, follows. A breakdown by sex is provided where appropriate.

^aHeterosexual contact with a person known to have, or to be at high risk for, HIV infection.
^bIncludes hemophilia, blood transfusion, perinatal exposure, and risk factor not reported or not identified.

^aFrom the beginning of the epidemic through 2013.
^bHeterosexual contact with a person known to have, or to be at high risk for, HIV infection.
^cIncludes hemophilia, blood transfusion, perinatal exposure, and risk factor not reported or not identified.

At the end of 2012, an estimated 508,845 persons in the United States were living with diagnosed HIV infection ever classified as Stage 3 (AIDS). Estimated numbers resulted from statistical adjustment that accounted for delays in reporting to the health department (but not for incomplete reporting) and missing transmission category, where appropriate.

Because of delays in reporting of deaths to the National HIV Surveillance System (NHSS), four years of prevalence data are displayed. The data reflect the persons living with an infection ever classified as stage 3 (AIDS) at the end of a given year during 2009-2012. The exclusion of data from the most recent year allows at least 18 months for deaths to be reported and for these persons to be removed from calculations of persons living with an AIDS diagnosis.

Totals include persons of unknown race/ethnicity. Because totals for the estimated numbers were calculated independently of the values for the subpopulations, the subpopulation values may not equal these totals.

In 2012, the estimated number of deaths of persons with diagnosed HIV infection ever classified as stage 3 (AIDS) in the United States was 13,712.

The cumulative estimated number of deaths of persons with diagnosed HIV infection ever classified as stage 3 (AIDS) in the United States, through 2012, was 658,507.

Deaths of persons with diagnosed HIV infection ever classified as stage 3 (AIDS) may be due to any cause.

Estimated numbers resulted from statistical adjustment that accounted for delays in reporting to the health department (but not for incomplete reporting) and missing transmission category, where appropriate. Because of delays in reporting of deaths, data are only available through the end of 2012. The exclusion of data from the most recent year allows at least 18 months for deaths of persons with an AIDS diagnosis to be reported.

Totals include persons of unknown race/ethnicity. Because totals for the estimated numbers were calculated independently of the values for the subpopulations, the subpopulation values may not equal these totals.

• NCHHSTP Atlas
• NCHHSTP State Profiles
• Statehealthfacts.org Provides state-by-state information about new and cumulative AIDS diagnoses, AIDS diagnosis rates, persons living with an AIDS diagnosis, AIDS deaths, diagnoses of HIV infections, HIV testing statistics and policies, additional AIDS-related state policies, Ryan White funding and other funding for HIV prevention, and AIDS Drug Assistance Programs, including budget, client, and expenditure data from the Kaiser Family Foundation.

HIV disease continues to be a serious health issue for parts of the world. Worldwide, there were about 2.1 million new cases of HIV in 2013. About 35 million people are living with HIV around the world. In 2013, there were about 1.5 million deaths in persons with AIDS, and nearly 39 million people with AIDS have died worldwide since the epidemic began. Even though Sub-Saharan Africa bears the biggest burden of HIV/AIDS, countries in South and Southeast Asia, Eastern Europe and Central Asia, and those in Latin America are significantly affected by HIV and AIDS. CDC's Global AIDS web site explains what CDC is doing in countries where HIV and AIDS have had great impact. Other resources for international HIV and AIDS statistics:

• For information on international HIV infection and AIDS statistics, visit theJoint United Nations Programme on HIV/AIDS.
• For current statistics on the number of reported AIDS cases in North, Central, and South America, please contact the Pan American Health Organization (PAHO), which also serves as the Regional Office for the Americas of the World Health Organization at 525 23rd Street, N.W., Washington, D.C. 20037; telephone: 202-974-3000.
• Other international web sites with information on HIV and AIDS are the World Health Organization (WHO) and the United States Agency for International Development (USAID).