Waiting period for sexually transmitted diseases or aids test results?

Which test?: Rapid HIV screens are usually available in 24 hrs or less. The HIV antibody screen can be available in 24-48 hrs or less depending on the lab, but the more sophisticated confirmatory western blot may take longer. The PCR for detection of viral nucleic acid may take some time, but a great deal of the delay depends on the laboratoryr expertise and the number of specimens they receive & frequency.