Good to knowOne result rarely tells the whole story. Your provider looks at your results together with your symptoms, exam, and other tests.
What the test is
Lab antigen/antibody tests can detect HIV about 18 to 45 days after exposure. Home and rapid tests may take longer.
Why it's done
- Routine screening
- New or multiple partners, sharing needles, or a partner with HIV
- Pregnancy
- Before and during PrEP
Getting ready and what happens
- No preparation is needed.
How the test is done
- A blood draw, finger prick, or mouth swab.
What the results mean
Positive
A positive result is confirmed with a second test. HIV treatment today lets people live long, healthy lives and prevents passing it on.
Negative
If the exposure was recent, retest after the window period.
When a result needs quick action
Call your provider todayA possible exposure in the last 72 hours. Ask about PEP (emergency HIV medicine) right away.
Questions to ask your provider
- What do my results mean for me?
- Do I need to repeat this test or have other tests?
- When should I retest?
- Is PrEP right for me?
Risks
A blood draw is very safe. You may have slight pain or a small bruise where the needle went in.
Related conditions
Related medicines
Related tests
Sources
Last updated 2026-11-13.