Although the patient may not have any symptoms during the incubation period of AIDS, the infection can be clarified by taking blood tests. If the test is positive, the patient is infected with AIDS. If the test is negative, the patient is not infected with AIDS. Once infected with HIV, the patient should be treated with antiretroviral drugs as soon as possible. During the treatment period, the patient should be reviewed regularly to check the viral reduction, CD4 and T-lymphocyte counts to assess the effectiveness of the treatment and the need to change the medication. As long as antiretroviral treatment is adhered to, the life expectancy of AIDS patients can reach or approach the level of normal people.