What the self-check looks at
The questions above follow the situations the WHO and other guidelines use to decide who benefits from PrEP; a doctor confirms the answer at your visit.
- A possible exposure in the last 72 hours. This comes first because it changes everything: PEP, not PrEP, is the right step.
- Condomless anal or vaginal sex in the past six months.
- A partner whose HIV status you don’t know, or a partner living with HIV who isn’t on effective treatment.
- A recent STI or a course of PEP, both signs that HIV exposure is possible.
- Sharing needles or injecting equipment.
One “yes” is enough for PrEP to be worth a conversation. Read more about each situation in who should take PrEP.
Reading your result
What each result means
| Result | What it means | Next step |
|---|---|---|
| You may need PEP | A possible exposure in the last 72 hours | Get urgent PEP help today |
| PrEP could be a good fit | At least one situation where PrEP adds protection | See what a PrEP visit involves |
| Lower risk right now | None of the situations apply at the moment | Regular testing; check again if things change |
The self-check gives general guidance only and isn’t a diagnosis. Your answers aren’t stored or sent to us.
When PrEP probably isn’t needed
PrEP is a choice, not an obligation. You may not need it if you use condoms every time, if you and your partner have both tested negative and only have sex with each other, or if your partner living with HIV has kept an undetectable viral load on treatment.
Life changes, though. Travel, new partners or the end of a relationship are good moments to take the check again.
Situations that need a little more advice
- Women and anyone having vaginal or front-hole sex: daily PrEP only; see PrEP for women.
- Trans people on hormones: PrEP and hormones can be taken together; see PrEP and gender-affirming hormones.
- Just finished PEP: you can move straight onto PrEP; see switching from PEP to PrEP.
- Visiting Thailand: timing matters; see PrEP for travellers.
- Kidney disease or hepatitis B: PrEP is often still possible, with tests first; see PrEP tests.
Your next step
If PrEP looks right, compare the daily, 2-1-1 and injectable options and check approximate PrEP costs, then book a confidential PrEP visit. If you have questions first, the PrEP FAQ page covers the most common ones.
Written by the HIV PrEP Bangkok team, based on WHO guidance. Last updated 2 October 2026.