In the acute phase, there may be a transient decrease in white blood cells and platelets, but this test does not have much significance in confirming the diagnosis. In the asymptomatic stage, most of the blood tests do not show any significant changes, but in the AIDS stage, the lymphocytes in the blood tests may drop significantly, and the function of the lymphocytes can be determined by the lymph count. However, if you want to diagnose AIDS, you should check the antigen and antibodies of HIV through blood sampling, so as to make sure whether you are infected with AIDS.