Blood donations are tested for HIV because HIV can be transmitted through the blood. In order to ensure that HIV is not spread through this blood donation, it is necessary to be tested for HIV antibodies. The test is usually done before donating blood, and if the test is negative for HIV antibodies, only then can you donate blood. In addition to testing for HIV antibodies, transaminases will be checked and other items will be checked. If there are significant abnormalities, blood donation will not be recommended. If the test is negative, AIDS can be basically ruled out and only then can you donate blood. Only if the blood is thoroughly tested at the time of donation can we be sure that this route of blood donation will not lead to the transmission of AIDS.