Category: Infections
Question: I took pep after exposure and went for test on the 28th day after exposure and it came back negativei want to Know if pep delays window period or can I trust that am free with this hiv test
Answer: Hello 

PostExposure Prophylaxis must be started within 72 hours after exposure to HIV and should be used only in emergency situations

If you are prescribed PEP you will need to take it every day for 28 days then return to your health care provider for repeat HIV testing 

PEP is not always 100 effective therefore you are required to test after 28 days and also every 3 months for up to a year for confirmation 

Cheers