A member asked:

At how many days after pep.is 4th gen test is conclusive ..bcoz i have tested with 4th gen test after 135days of last pep dose. is this is a conclusive report . or i need to retest.? i got herbes zoster after at 80th day after pep?

A doctor has provided 1 answer
Dr. Hunter Handsfield answered

Specializes in Infectious Disease

Most experts agree the HIV AgAb ("4th generation") blood tests are conclusive 6 weeks after the last dose of PEP, although a few might recommend 3 months. For sure your negative result at 135 days is conclusive; you don't have HIV. Herpes zoster (shingles) is common in people without HIV and rarely is a clue about HIV infection.

Answered 5/5/2023

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