How to get tested for HIV after high-risk behavior is a question that many people want to know. The timing of HIV testing is a very scientific issue, and how to test for HIV within the best time is the most critical first step in the timely treatment of an infected person. This article will give you a detailed introduction to when the best time for HIV testing is. I. There are several ways to get tested for AIDS, you can choose according to your situation: 1. Each local disease control center (epidemic prevention station): line up, see a doctor, draw blood, and get the results. Testing at the CDC is free, but you need to bring your ID card to do so, and the results generally come out in about 1 week. Advantages: free, accurate results; disadvantages: slightly slow. 2, the regular hospital (recommended 3 A hospital): registration, see a doctor, a list, pay, draw blood, take the results. In the hospital test is charged, about 100 yuan, the price will vary slightly from place to place, do not need to bring ID cards, generally about 2 days out of the results. Advantages: the results are accurate. Disadvantages: relatively more trouble, and charges. 3, the use of HIV test strips: personal use of HIV professional test reagents to detect HIV antibodies, such test reagents are rapid diagnostic reagents, with excellent sensitivity and specificity, 15 minutes to results, fast, accurate and reliable, simple to operate, individuals can also operate. Since self-testing is more conducive to the protection of personal privacy, it has increased the motivation of individuals to test for HIV. Advantages: fast, accurate and reliable results, better privacy. Disadvantages: charges. Second, the accuracy of HIV testing at different times. After high-risk behavior, it generally takes 2 weeks to detect HIV antibodies. The more time that passes, the more accurate the test will be. There is a “window period” after the human body is infected with HIV. The currently accepted window period in China is 6 weeks to 2 months. False negative results can occur during this window period. However, the vast majority of people are 100% cleared at 6 weeks. The accuracy of HIV testing at different times varies. The probability of detecting antibodies at 1 week: 22.6%. Probability of detecting antibodies at 2 weeks: 53.775%. Probability of antibody detection at 3 weeks: 84.1%. Probability of antibody detection at 4 weeks: 98.4%. Probability of antibody detection at 5 weeks: 99.45%. Probability of antibody detection at 6 weeks: 99.994%. Probability of antibody detection at 7 weeks: 99.99986%. Probability of antibody detection at 8 weeks: 99.999999979%. Therefore, we recommend those who have had high-risk behavior to be tested at 6 weeks and 2 months respectively, or of course, to start testing after 2 weeks in order to gradually release the psychological pressure. Test for HIV within the best time to get the best time for your treatment, to prolong your life and to defend your health.