HIV symptoms
What the symptoms of HIV are, what they mean, and why symptoms alone can’t confirm or rule it out.
HIV symptoms vary widely from person to person. Some people develop a flu-like illness 2 to 4 weeks after possible exposure. Others have no noticeable symptoms for years. The only way to know your HIV status is to test.¹ ²
How HIV symptoms work
In the first weeks after infection the virus multiplies rapidly, and around half to two-thirds of people develop a short flu-like illness — the acute stage. These early symptoms, and how soon they appear, are covered in detail on our early HIV symptoms and timeline page.
Early HIV symptoms and timeline →
After this initial period, HIV enters a longer phase called clinical latency, during which there may be no obvious symptoms at all. This phase can last for years. Without treatment, HIV gradually weakens the immune system, eventually leading to the most advanced stage (AIDS) where the body becomes vulnerable to opportunistic infections and certain cancers.²
Modern HIV treatment is highly effective. People diagnosed with HIV today, who start treatment promptly and reach an undetectable viral load, can live long, healthy lives and cannot transmit HIV sexually.⁶ ⁷ This is known as U=U (Undetectable = Untransmittable).
The three stages of HIV
Without treatment, HIV typically progresses through three stages. Modern antiretroviral therapy stops this progression. Most people on treatment never reach the later stages.
Acute HIV infection
2–4 weeks after exposure
A short flu-like illness during the highest-viral-load period; the testing window is 21–84 days.
See the full list of early symptoms and timing on the early HIV symptoms page →
Clinical latency
Years (typically 8–10 years without treatment)
After the acute phase, HIV enters a long period during which there may be no obvious symptoms. The virus is still active, slowly damaging the immune system, but a person may feel and look completely healthy. This is why testing matters — symptoms cannot be relied on during this stage. With effective treatment, people remain in this stage indefinitely (without progressing to AIDS) and can live a normal life span.
Common symptoms
- Often no symptoms at all
- Some people experience occasional fatigue or low-grade fever
- Mild swollen lymph nodes (sometimes persistent)
- Skin or oral conditions (occasional)
AIDS (advanced HIV)
Without treatment
AIDS is the most advanced stage of HIV infection, when the immune system has been severely damaged. This stage is now uncommon in countries with widespread access to HIV treatment, because effective therapy prevents progression. AIDS is defined by either a CD4 count below 200 cells/mm³ or the development of certain serious opportunistic infections.²
Common symptoms
- Rapid weight loss
- Recurring fever or night sweats
- Extreme tiredness
- Persistent diarrhoea (over a week)
- Sores in mouth, anus, or genitals
- Pneumonia or other opportunistic infections
- Memory loss, depression, or neurological symptoms
- Red, brown, pink, or purplish blotches on or under the skin
HIV symptoms in women
The early, flu-like signs of HIV are largely the same for women and men — there are no early symptoms unique to women. In later, untreated infection some women notice gynaecological signs such as recurrent vaginal infections or changes in their cycle, though each of these is common on its own and rarely related to HIV.
When you should test
Testing is the only way to know your HIV status. If any of the following apply to you, testing is the responsible next step:
- You had unprotected sex (vaginal, anal, or oral) with a partner whose HIV status you do not know
- You shared injection equipment with another person
- You experienced sexual assault
- A current or recent partner has been diagnosed with HIV
- You have any of the symptoms described above and have had a possible exposure in the past few weeks
- You are routinely tested as part of sexual health care (annually for sexually active adults; more frequently for higher-exposure groups)
The window period for antibody-based self-tests is 21 to 84 days after possible exposure.⁵ Testing too early may give a false negative because antibodies have not yet developed.
For step-by-step guidance on what kind of test to take and when, see our HIV Testing Guide.
What if you have symptoms but a non-reactive test?
This is a common and important question. A non-reactive self-test means no HIV antibodies were detected at the time of testing. However, antibodies take time to develop after exposure — typically 21 to 84 days⁵ — and a test taken during this window period may give a false negative.
If you have symptoms that could be HIV and have had a possible exposure within the past three months:
- Retest after 84 days (12 weeks) from the possible exposure to be certain
- Consider laboratory testing through a healthcare provider, which can detect HIV earlier than antibody-based self-tests
- Most flu-like illnesses are not HIV — but persistent or unusual symptoms in the context of a recent exposure should be discussed with a healthcare provider
Most non-reactive results are accurate. Testing within the recommended window period and retesting if your situation calls for it gives you the highest level of certainty.
A note on modern HIV outcomes
HIV today is a manageable, long-term condition. People diagnosed with HIV who start treatment promptly and stay on it can live full, healthy lives — with life expectancy comparable to people without HIV.⁶ ⁷
A person on effective treatment whose viral load is undetectable cannot transmit HIV to a sexual partner. This is known as U=U (Undetectable = Untransmittable) and is supported by large multi-year clinical studies.⁶ ⁷
For people who are concerned about a possible exposure, testing is the gateway to information, peace of mind if non-reactive, or — if reactive — to early treatment and the prospect of a healthy life with HIV.
Frequently asked questions
What are the early symptoms of HIV?
Acute HIV infection occurs about 2-4 weeks after exposure: a short flu-like illness during the highest-viral-load period. Symptoms alone cannot confirm or rule out HIV - only a test can. The testing window is 21-84 days.
Can you have HIV without any symptoms?
Yes. After the acute phase, HIV enters a long period (clinical latency, typically 8-10 years without treatment) during which there may be no obvious symptoms. The virus is still active, slowly damaging the immune system, but a person may feel and look completely healthy. This is why testing matters - symptoms cannot be relied on during this stage.
What are the three stages of HIV?
(1) Acute HIV infection (2-4 weeks after exposure) - a short flu-like illness. (2) Clinical latency (years; typically 8-10 without treatment) - often no symptoms at all. (3) AIDS (advanced HIV, without treatment) - the immune system is severely damaged; now uncommon where HIV treatment is widely available.
When should you get tested for HIV?
Consider testing if you had unprotected sex with a partner whose HIV status you do not know, shared injection equipment, experienced sexual assault, have a partner diagnosed with HIV, have any of the symptoms above with a possible recent exposure, or as part of routine sexual health care.
What is AIDS (advanced HIV)?
AIDS is the most advanced stage of HIV infection, when the immune system has been severely damaged. It is defined by either a CD4 count below 200 cells/mm³ or the development of certain serious opportunistic infections. It is now uncommon in countries with widespread access to HIV treatment, because effective therapy prevents progression.