A member asked:

I had a sexual encounter msm me being top unprotected. i had a 4th gen hiv lab testand cbc test at 28 days, both tests showed no evidence of infection and all my wbc counts were stone cold normal. can i move on or should i test again for hiv?

2 doctors weighed in across 2 answers
Dr. Timothy Brown answered

Specializes in Obstetrics and Gynecology

While it is reassuring that you are negative so far, you need to do a follow up test at least 90 days after potential exposure. A positive test may take that long to develop. The CBC is too nonspecific to be useful in this situation. If you ever have a definite exposure, treatment initiated within 72 hours can be effective in preventing infection.

Answered Dec 25, 2021

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Dr. Gurmukh Singh answered

Specializes in Pathology

Get tested at 6 weeks after exposure. Visit this site for information on this topic: HIV test window periods https://www.cdc.gov/hiv/basics/hiv-testing/test-types.html

Answered Dec 25, 2021

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