The most accurate way to find out if the other person has HIV is to go to the hospital for an HIV-related test. If the other person is prone to opportunistic infections such as thrush and Kaposi’s sarcoma, this can also help in the initial determination. By having the person go to the hospital for HIV-1/2 antibody testing, repeat testing is required if the screening test is positive. If one or both of the reagents react positively, AIDS can be suspected and further immunoblotting is required to perform a complementary HIV antibody test. Clinically, AIDS can be divided into three phases, the acute phase refers to about 2 to 4 weeks after infection with HIV, some may appear flu-like symptoms, the specificity is not high; asymptomatic period is generally an average of 8 to 10 years, during which there are no obvious symptoms; AIDS patients may have persistent fever, diarrhea, weight loss, generalized superficial lymph node enlargement, as well as a variety of opportunistic infections and even tumors. Therefore, to determine whether the other person has AIDS or not, we should mainly rely on the results of laboratory tests specific for AIDS. Before determining whether the other person has AIDS, if you have sex, you must take protective measures.