A member asked:

4th gen test on hiv works on all types and subtypes of hiv ?and if somebody cant create antibody antigen p24 is always there ?

A doctor has provided 1 answer
Dr. Hunter Handsfield answered

Specializes in Infectious Disease

Yes, the test detects all HIV types and subtypes. And yes, if for some reason antibody doesn't develop, p24 antigen will remain detectable. Don't over think it: if you have had a negative AgAb (4th generation) HIV blood test more than 6 weeks after the last possible exposure, it is 100% certain you did not catch HIV. There are no exceptions.

Answered 12/2/2021

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