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A member asked:
Had protected vaginal sex with csw. how reliable is negative hiv p24 antigen combo test at 20 days mark? also, getting results tomorrow for hiv rna pcr at 19 days. will that be conclusive if negative?
A doctor has provided 1 answer
Pretty reliable: most people who turn positive would be positive at least borderline by day 14-20. There are uncommon cases of over 1 month to turn positive. NOte that the incidence of this is far lower than the liklihood of someone Totally Lying about What They are Doing !. Oh, sorry, that's for the antibody. The antigen/other measures of virus should be done TOGETHER with antibody. REALLY low risk of false negat
Answered 7/31/2018
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