The probability of a false positive HIV antibody test is not easy to say, there is no specific value and the probability of a false positive test is generally not very high. There are many reasons for a false positive HIV antibody test, such as the limitations of the hospital’s testing level, and whether the patient has other underlying diseases or is taking medications, which may lead to a false positive. Currently, HIV testing is generally done by checking the HIV antibodies. If the HIV antibodies are positive, a further confirmatory test is required, and if the confirmatory test is also positive, the diagnosis is clear. If the confirmatory test is negative, a positive initial screening test is a false positive.