Coping with HIV/AIDS today means getting on treatment fast and staying on it. HIV isn't curable, but daily HIV medicine (ART) can push the virus to undetectable levels, protect your health, and stop you passing it to partners. Most people live long, near-normal lives if they test, start early, and stay connected to care.
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 and AIDS actually are
HIV is a virus that attacks the immune system, specifically the CD4 cells that coordinate your body's defenses CDC. Left untreated, it moves through three stages. The first is acute infection, when the virus multiplies fast and the viral load is very high, making this the most contagious window. Next is chronic HIV (clinical latency), where the virus stays active but quiet; without treatment this stage can last a decade or more while it slowly wears down the immune system. The final stage is AIDS, the most severe, defined by a CD4 count under 200 cells/mm³ or an opportunistic infection that takes hold because the immune system can no longer hold the line.
There's currently no effective cure, so once a person has HIV they have it for life StatPearls. But "for life" no longer means what it once did. A 20-year-old who starts treatment before their CD4 count drops below 200 now has a life expectancy approaching that of the general population Lancet HIV. That fact is why testing and starting early matter so much.
Symptoms — and the silent reality
Within 2 to 4 weeks of infection, many people develop a flu-like illness called acute retroviral syndrome hiv.gov. About 9 in 10 people get some version of it, and it tends to hit when the viral load peaks above a million copies/mL, so you're at your most contagious while feeling sick. Common symptoms include:
- Fever, chills, and night sweats
- A rash, often on the torso
- Sore throat and mouth ulcers (small painful sores inside the mouth)
- Muscle aches and deep fatigue
- Swollen lymph nodes (tender lumps in the neck, armpits, or groin)
This looks like the flu, mono, or any number of viral illnesses, and some people have no symptoms at all. Only a test can confirm or rule out HIV. After the acute phase, people often go years with no symptoms during clinical latency, which is why someone can carry HIV without knowing. If you've had flu-like symptoms in the weeks after a possible exposure, treat it as a reason for an urgent test rather than something to wait out.
How HIV spreads (and how it doesn't)
Only certain body fluids carry enough virus to transmit HIV: blood, semen, vaginal fluid, rectal fluid, and breast milk CDC. The main routes are anal or vaginal sex, sharing needles or other injection equipment, and passing from parent to child during pregnancy, childbirth, or breastfeeding.
Just as important is what does not spread HIV. The virus doesn't survive long outside the body, so you can't catch it from saliva, kissing, hugging, shared utensils, toilet seats, food, water, air, insect bites, or donating blood. Worried specifically about mouth-to-mouth contact? See can you get hiv from oral sex or kissing? for the detail.
How HIV is tested
Testing is quick and often free. A finger-stick or oral-swab rapid test can give results in minutes, while a lab blood draw is the most sensitive, and at-home kits exist if you'd rather not go in person. Health departments frequently offer it at no cost. Respect the window period: the time after exposure before a test can reliably detect infection.
| Test type | What it detects | Window after exposure |
|---|---|---|
| Nucleic-acid test (NAT) | The virus itself (RNA) | 10–33 days |
| Antigen/antibody (4th-gen lab) | Antibodies + p24 antigen | 18–45 days |
| Antibody / rapid tests | Antibodies only | 23–90 days |
A negative result is only conclusive after the window has passed with no exposures during it CDC. The USPSTF gives HIV screening a Grade A recommendation: everyone ages 15 to 65 should be tested at least once, and people at higher risk should repeat at least annually per the CDC USPSTF. For how the different methods compare and which to pick, see our guide to hiv testing, and to time it right after a risk, check when to test after exposure. Ready now? You can get tested or compare testing providers first.
Treatment: what living with HIV looks like
Everyone diagnosed with HIV should start treatment, called antiretroviral therapy or ART, as soon as possible CDC. ART is a combination of HIV medicines, available as single daily pills or combination regimens; the drug classes include integrase inhibitors, NRTIs, NNRTIs, and protease inhibitors. The goal is an undetectable viral load, which most people reach within about six months of starting.
Treatment is lifelong because even when the virus is undetectable, latent reservoirs of HIV stay hidden in cells and tissues, and the virus rebounds if you stop HHS clinicalinfo. Undetectable means controlled, not cured. There's no sterilizing cure (clearing all virus) or functional cure (lasting control without medicine) available today NIAID. A handful of people have reached long-term remission after stem-cell transplants done to treat cancer, including the Berlin and London patients and a New York woman, the third documented case and first woman NIH, 2022, but those transplants are high-risk, used rare HIV-resistant donor cells, and are not a scalable cure. A cure remains an active research goal, not a current option.
U=U: treatment is also prevention
Undetectable equals untransmittable. A person who takes ART as prescribed and stays virally suppressed will not transmit HIV to sex partners CDC. Across the PARTNER studies, mixed-status couples logged tens of thousands of condomless sex acts with zero linked transmissions while the partner with HIV was undetectable PARTNER, Lancet. Treatment protects your health and your partners at the same time.
What happens if HIV goes untreated
Without treatment, HIV keeps depleting CD4 cells until the immune system can no longer defend the body. When the CD4 count falls under 200 or an opportunistic infection appears, the diagnosis becomes AIDS, the most severe stage. Opportunistic infections are illnesses (certain pneumonias, fungal infections, and cancers) that a healthy immune system would normally fend off but that turn dangerous once defenses collapse. Starting ART before that point preserves a normal lifespan.
Prevention you can act on
The CDC's core prevention tools are condoms, PrEP, PEP, treatment-as-prevention (U=U), and regular testing CDC.
- PrEP is medicine for people without HIV. Daily oral options (Truvada and Descovy) and the long-acting injectable cabotegravir (Apretude) cut HIV risk from sex by about 99% and from injection drug use by at least 74% when taken as prescribed. Descovy isn't approved for people at risk through receptive vaginal sex or for those who inject drugs; Truvada covers all routes. Starting PrEP needs a confirmed HIV-negative test, 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 start within 72 hours of a possible exposure CDC. Started fast, it sharply cuts the chance of infection. If you might have just been exposed, take it to urgent care or the ER right away rather than waiting to test.
- Newer long-acting prevention is moving quickly. Twice-yearly injectable lenacapavir produced zero infections among women in the PURPOSE 1 trial, the strongest HIV-prevention result recorded yet WHO.
- Preventing parent-to-child transmission works: with ART during pregnancy and labor plus newborn prophylaxis, the risk of passing HIV to the baby can be reduced to less than 1%.
When to see a clinician
Get urgent care within 72 hours if you think you were just exposed; that's the PEP window, and every hour counts. Otherwise, see a clinician promptly if you have flu-like symptoms after a possible exposure, if you've never been screened (everyone should be at least once), or if you have ongoing risk and aren't on PrEP. If you test positive, get into care fast. Starting ART early is the single biggest factor in living a long, healthy life.