HIV antibody is one of the items of AIDS examination, and most of them need to be tested before surgery or during prenatal examination. When the human body is infected with HIV, corresponding HIV antibodies are produced. Except for a short window period in the early stages, HIV antibodies can exist stably and be detected for a long time. So, is HIV antibody negative good or bad?
HIV in AIDS patients mainly exists in the blood, semen, vaginal secretions, hydrothorax, ascites, cerebrospinal fluid and milk of infected persons and patients. The human body is mainly infected with HIV through the following three routes: sexual transmission (including same-sex, heterosexual, and intersex transmission), blood and blood products (including shared needles, intravenous drug use, and interventional medical procedures), and mother to child transmission.
There are two possibilities for a negative result. The first is that the subject is not infected with AIDS virus, and the second is that although he is infected with AIDS virus, he has not produced enough detectable antibodies and is still in the window period. At present, there is a great deal of inconsistency regarding the length of the 'window period'. The reason is that due to individual differences, the length of time that antibodies appear in the body of each person infected with AIDS virus may vary.
In the inspection process, whether AIDS antibody can be detected depends on the concentration of human antibody on the one hand, and the sensitivity of antibody detection methods on the other hand. With the development of detection technology, the sensitivity of detection reagents is increasing. Most people can detect anti AIDS virus antibodies in their bodies between the 4th and 8th weeks after infection with AIDS virus. Almost all people can detect antibodies three months after infection occurs.
Therefore, if people with high-risk behaviors have negative results of AIDS virus antibody detection after the window period, AIDS virus infection can be excluded, and no re examination is required. If within the window period, even if the initial screening test result is negative, follow-up re examination is still required.
