The incubation period of AIDS is related to the means of detection, and AIDS can usually be ruled out in 3 months. AIDS is an infectious disease that poses a major threat to human health and is transmitted in a variety of ways, with sexual intercourse being the most dangerous and major route of transmission. There are also more means of HIV testing, and the window period is different for different means of testing.1. HIV antibody test: HIV antibody test needs to be performed 6 weeks after high-risk behavior, and if the result is negative, it can be ruled out. If the antigen is also detected, the time of detection can be advanced, it can be detected about 3 weeks after the high-risk sex, and the result is negative, it can be largely ruled out; 2, HIV viral load or nucleic acid test: about 2 weeks after the infection of HIV, there is a large amount of HIV in the blood, at this time, the viral load test, if the result is negative, about 2 weeks can be ruled out. It generally takes about 3 months from HIV infection to detection of antibodies, and the length of time is also related to the physical condition of the infected person. Patients who are in poor health should go to the hospital early for viral testing to rule out the possibility of the disease.