Approximately 1.2 million people in the United States are living with HIV, and a significant portion of them have at some point received a stage 3 (AIDS) classification. The CDC tracks HIV and AIDS together because modern treatment has blurred the line between the two: someone diagnosed with AIDS can recover immune function with medication, though the classification remains on their medical record. Each year, roughly 31,800 new HIV infections occur in the U.S., with a smaller subset progressing to AIDS before or shortly after diagnosis.
What Separates HIV From AIDS
HIV is the virus. AIDS is the most advanced stage of infection, formally called “stage 3 HIV.” A person receives an AIDS diagnosis when their CD4 cell count drops below 200 cells per cubic millimeter of blood, or when they develop certain serious infections that signal a severely weakened immune system. A healthy CD4 count typically ranges from 500 to 1,500.
This distinction matters because most people with HIV in the U.S. today never progress to AIDS if they start treatment early. Effective antiretroviral therapy keeps the virus suppressed and the immune system intact. But for people who are diagnosed late, lose access to care, or don’t take medication consistently, progression to AIDS remains a real risk.
How Many People Are Living With HIV Overall
The most recent CDC estimates put the number of people living with HIV in the United States at roughly 1.2 million. Of those, an estimated 13% don’t know they’re infected, which means they aren’t receiving treatment and are more likely to progress to AIDS over time. In 2022, about 38,000 people received a new HIV diagnosis, and an estimated 31,800 new infections occurred that year.
The number of new AIDS diagnoses has dropped dramatically since the 1990s, when tens of thousands of people were classified as stage 3 each year. The introduction of combination antiretroviral therapy in the mid-1990s transformed HIV from a near-certain death sentence into a manageable chronic condition for most people with access to care.
Viral Suppression and the Care Gap
Viral suppression is the key metric for preventing AIDS. When someone with HIV takes medication consistently enough to reduce the virus to undetectable levels in their blood, their immune system stays strong and they cannot transmit the virus sexually. In 2022, 65% of people with diagnosed HIV in the U.S. had achieved viral suppression. That leaves roughly one in three people with a diagnosis who had not suppressed the virus, whether because of gaps in care, medication access, or other barriers.
The care pipeline tells part of the story. Over 80% of newly diagnosed people were linked to care within a month, but only 54% were retained in ongoing care. That drop-off between initial connection and sustained treatment is where many people fall through, and where the risk of progressing to AIDS rises.
Who Is Most Affected
HIV and AIDS do not affect all communities equally. Black and Hispanic Americans made up more than 70% of estimated new HIV infections in 2022 despite representing a much smaller share of the total U.S. population. These disparities are driven by systemic factors: uneven access to healthcare, higher rates of poverty, stigma that discourages testing, and less access to preventive medications like PrEP.
Geographically, the South carries a disproportionate burden. In 2022, 52% of all new HIV diagnoses occurred in Southern states, and the region accounted for about half of the estimated 31,800 new infections. The federal Ending the HIV Epidemic initiative has focused on 48 counties, Washington, D.C., San Juan, and seven states with high rural HIV rates, recognizing that over half of all diagnoses are concentrated in a relatively small number of places.
Deaths From HIV and AIDS
Despite the availability of effective treatment, HIV and AIDS still cause thousands of deaths each year in the U.S. The most recent national vital statistics data recorded 4,589 deaths, a rate of 1.3 per 100,000 people. That number has fallen sharply from the epidemic’s peak in the mid-1990s, when more than 50,000 Americans died from AIDS-related causes in a single year. Most deaths today occur among people who were diagnosed late, lost access to treatment, or faced compounding health conditions.
Why the Exact AIDS Number Is Hard to Pin Down
One reason a clean count of “people with AIDS” is tricky: the classification is permanent. Once a person’s CD4 count drops below 200 and they receive a stage 3 diagnosis, that label stays even if treatment restores their immune function to normal levels. So the total number of people ever classified with AIDS is much larger than the number currently experiencing immune suppression severe enough to put them at risk of opportunistic infections.
What’s more useful to track is how many people with HIV are not virally suppressed, since those are the individuals most at risk of progression. With 35% of diagnosed people not achieving viral suppression in 2022, and an additional estimated 160,000 or so who don’t know their status at all, the population vulnerable to AIDS remains substantial even in an era of highly effective treatment.