PCR stands for Polymerase Chain Reaction. This test looks directly for HIV RNA in your blood. This test does not wait for your body to make antibodies to HIV infection. It has the shortest potential window period and can detect HIV after 3 days to 4 weeks after an exposure.
PCR stands for Polymerase Chain Reaction. This test looks directly for HIV DNA in blood. It has the shortest potential window period and can be used from 3 days to 4 weeks after an exposure.