HIV is not a young person's disease. People over 50 make up a meaningful share of new diagnoses, and the virus spreads the same way at any age — through anal or vaginal sex and shared needles. Older adults often get diagnosed late because symptoms are missed or never appear. A simple test is the only way to know.
in 2023
≈723,000 — U=U
| Item | Value |
|---|---|
| New diagnoses | 38,800 — in 2023 |
| Living with HIV | 1.12 million |
| Virally suppressed | ~65% — ≈723,000 — U=U |
| On PrEP | 381,000 |
What HIV actually is
HIV is a virus that attacks the body's immune system CDC. It moves through three stages: acute infection, when the viral load is very high and the person is very contagious; chronic infection (clinical latency), when the virus stays active but quiet and can last a decade or more without treatment; and AIDS, the most severe stage, defined by a CD4 count under 200 cells/mm³ or an opportunistic infection. About 1.12 million people are living with HIV in the US, and roughly 38,800 were newly diagnosed in 2023 CDC AtlasPlus, 2023.
There's no cure, but HIV is manageable. People who get HIV have it for life, yet with treatment they can live long, healthy lives and protect their partners. For the wider picture on who's been affected, see our hiv facts & statistics - who’s been affected by hiv.
Symptoms — and the silent reality
Within 2 to 4 weeks of infection, about 90% of people develop flu-like symptoms called acute retroviral syndrome hiv.gov: fever, chills, rash, night sweats, muscle aches, sore throat, fatigue, swollen lymph nodes, and mouth ulcers. They look exactly like the flu. In older adults, fatigue or aches get blamed on age, and the diagnosis gets delayed.
Some people have no symptoms at all. After the acute phase, the virus can sit silently for years during clinical latency, with no warning signs. A test is the only thing that confirms or rules out HIV. That matters, because those early flu-like weeks are when the viral load peaks above a million copies/mL and onward transmission risk is highest StatPearls.
How HIV spreads (and how it doesn't)
Only certain body fluids carry HIV: blood, semen, vaginal fluid, rectal fluid, and breast milk CDC. The routes are anal or vaginal sex, sharing needles or injection equipment, and from parent to child during pregnancy, childbirth, or breastfeeding. None of this changes after menopause or after age 50, and condom use tends to drop in older relationships, which raises risk.
HIV does not spread through saliva, kissing, casual contact, surfaces, food, donating blood, insects, water, or air. The virus doesn't survive long outside the body. Sharing a meal, a hug, or a toilet seat carries no risk.
How HIV is tested
Testing is quick. A finger-stick or oral-swab rapid test gives results in minutes, or a lab blood test offers more sensitivity earlier. Tests are free at many health departments, and at-home kits exist CDC. Watch the window period, the gap between exposure and when a test can detect the virus.
| Test type | Detection window after exposure |
|---|---|
| Nucleic-acid test (NAT) | 10–33 days |
| Antigen/antibody (4th-gen) lab test | 18–45 days |
| Antibody / rapid tests | 23–90 days |
A negative result is only conclusive after the window has passed with no exposure during it. For the full breakdown of which test to use and how long to wait, see when to test after exposure — and you can get tested or compare testing providers to find an option that fits.
The USPSTF gives HIV screening a Grade A recommendation: every adolescent and adult ages 15 to 65 should be screened at least once, with repeat testing for anyone at increased risk USPSTF. The CDC suggests at least annually for those at ongoing risk. The age cutoff of 65 is a screening floor, and it doesn't mean older adults are done. Risk depends on behavior, not birthday.
Treatment
Everyone with HIV should start antiretroviral therapy (ART) as soon as possible after diagnosis CDC. ART is a combination of HIV medicines — single-pill and combination options exist, drawing on integrase inhibitors, NRTIs, NNRTIs, and protease inhibitors. Treatment is lifelong, and the goal is an undetectable viral load.
Starting early matters at any age. A 20-year-old who begins treatment before their CD4 count falls below 200 now has a life expectancy approaching that of the general population Lancet HIV. For older adults, early treatment also means fewer complications from a virus that's harder on an already-aging immune system. Most people reach undetectable within 6 months of starting ART. Read more on how earlier hiv treatment can help prevention.
There's no cure. ART controls the virus but doesn't remove it. Latent HIV reservoirs persist in cells, and the virus rebounds if treatment stops HHS clinicalinfo. A handful of people have reached long-term remission after stem-cell transplants done for cancer, using rare HIV-resistant donor cells, but those are high-risk and not a scalable cure NIH, 2022. A cure remains a research goal, not an option today.
Complications if untreated
Untreated HIV slowly destroys the immune system and progresses to AIDS — a CD4 count under 200 or an opportunistic infection, a serious infection that takes hold only when immune defenses are too weak to fight it off. Older adults are especially vulnerable. Aging already lowers immune reserve, so untreated infection can advance faster and hit harder. Late diagnosis is the main driver of poor outcomes, and it's more common in people who never thought HIV applied to them.
Prevention
The CDC's core prevention tools are condoms, PrEP, PEP, treatment-as-prevention (U=U), and regular testing CDC PrEP. PrEP is for people without HIV who are exposed through sex or injection drug use; daily oral options include Truvada and Descovy, and the long-acting injectable cabotegravir (Apretude) is given as two starter doses a month apart, then every 2 months. Taken as prescribed, PrEP cuts HIV risk from sex by about 99%.
- Condoms block the fluids that carry HIV and also prevent other STIs — useful at any age, including in new relationships after divorce or widowhood.
- PrEP requires a confirmed HIV-negative test before starting, plus baseline kidney, hepatitis B, and STI checks, with follow-up every 3 months for pills or every 2 months for the shot.
- PEP is the emergency option: a 28-day course that must begin within 72 hours of a possible exposure and cut seroconversion by about 81% in the original study CDC PEP. If you might have just been exposed, that's an urgent-care or ER conversation today, not a wait-and-test one.
- U=U means treatment is prevention. A partner on ART who's virally suppressed protects you.
U=U is backed by hard data. Across the PARTNER, Opposites Attract, and PARTNER2 studies — more than 125,000 condomless sex acts among mixed-status couples — there were zero linked transmissions while the HIV-positive partner stayed undetectable (under 200 copies/mL) PARTNER, Lancet. Newer long-acting prevention is advancing too: twice-yearly injectable lenacapavir produced zero infections among women in the PURPOSE 1 trial WHO.
When to see a clinician
See a clinician right away if you've had a possible exposure in the last 72 hours, because PEP works only when it's started fast. Get tested if you have flu-like symptoms a few weeks after a risk, if you're starting a new sexual relationship, or if you've simply never been screened. And if you're at ongoing risk, ask about PrEP and annual testing. Age is not a reason to skip the conversation.