The most important factor in diagnosing HIV infection is a positive HIV antibody. When a person is infected with HIV, there are no obvious signs or symptoms for a long period of time, so it is not possible to determine whether or not a person is infected with HIV from the symptoms or appearance. After a person is infected with HIV, specific antibodies are usually produced after two weeks, but these antibodies do not protect the body and only indicate that the body is infected with HIV. Therefore, to know if you are infected with HIV, you must go to a testing organization to test for antibodies, and when the report is issued to be reviewed, the blood will be sent to the CDC to do a confirmatory test, and the report will be issued only after the HIV antibody is positive and the diagnosis has been confirmed by the confirmatory test.