6. Have you been at risk for HIV in the past six months?
According to AIDS.gov, the likelihood of a false negative depends on when you might have been exposed to HIV and when you took the test: “It takes time for seroconversion to occur. This is when your body begins to produce the antibodies an HIV test is looking for—anywhere from two weeks to six months after infection. So if you have an HIV test with a negative result within three months of your last possible exposure to HIV, the CDC recommends that you be retested three months after that first screening test. A negative result is only accurate if you haven’t had any risks for HIV infection in the last six months—and a negative result is only good for past exposure.”