HIV infection can be ruled out by testing for HIV nucleic acids and antibodies more than 3 months after high risk, if the test is still negative.
HIV infection does not usually occur immediately after infection and there is a certain window period for testing. The window period varies from 2 weeks at the earliest to 3 months for very few patients, as each person at risk has a different body type and different underlying disease. Within 1-4 weeks after high risk, some of them may have unexplained fever, swollen lymph nodes, diarrhea and other symptoms, at which time they need to go to the regular hospital STD department or infection department to check for HIV antibodies. Generally, 4 weeks can rule out 98%-99% of the possibility, and 6-8 weeks can rule out more than 99.9% of HIV infection. Under normal circumstances, a 12-week period can be completely ruled out.
After high-risk exposure, not all people will be infected. It is necessary to adjust a good attitude, avoid anxiety and other bad emotions, and it is recommended to go to the relevant departments of regular hospitals and AIDS testing centers for testing in a timely manner.