HIV, or AIDS, can usually be detected by a blood test during the incubation period. AIDS is a chronic infectious disease caused by the human immunodeficiency virus. It can cause great damage to the human immune system. It is mainly transmitted through sex, blood and mother-to-child transmission. There is currently no effective cure. There are usually no special symptoms after HIV infection, and the incubation period of HIV in the human body is about six to eight years, and it will go through a long incubation stage before it develops into the typical AIDS. The diagnosis can be confirmed by a blood test, which is usually positive for HIV. During the incubation period of AIDS, blood tests can be taken at the STD department of a hospital for a definitive diagnosis. If the infection is confirmed, early and standardized treatment should be carried out under the advice of a doctor.