It does not take a year for antibodies to develop after high-risk sex.
HIV antibodies from high-risk sex can be detected as early as two weeks and as late as three months. To determine whether the organism has been infected with HIV or not, the antibody test can be used.
After high-risk sex, you need to be tested at two weeks, four weeks, six weeks, and twelve weeks with either a 3-generation or 4-generation HIV card. A negative HIV test after three months rules out the possibility of HIV. A four-generation card that is negative for more than six weeks rules out AIDS, and you cannot test positive after one year. If the test is positive after one year, it is considered that the test was wrong or the infection is recent.
After high-risk sex, if you have never been tested with an AIDS antibody card and test positive after one year, you need to do further confirmatory tests for AIDS, and if both tests are positive, it means that you have already been infected with AIDS and have entered the asymptomatic stage.