Hiv 3 months test, is this conclusive?

A“window period”: Is when an infected person does not yet have a positive HIV test result. This is because it takes time for the body to develop antibodies to HIV. HIV test can show infection in most people W/I 3 months (average of 25 days to build HIV antibodies). A 3 month negative test may be repeated at 6 month point to pick up on situations in which it takes longer to develop antibodies to HIV.