AIDS clinical stages are divided into four phases: acute infection phase, asymptomatic infection phase, AIDS prodrome, and AIDS phase. The acute infection phase refers to the period after a person is infected with HIV, where symptoms similar to a common cold can appear after half a month, and the symptoms generally disappear after a month. Two months later, HIV antibodies can be detected through blood tests. After this, the person enters the asymptomatic infection phase, which on average can last for 7-8 years, and in some cases, up to about 10 years, followed by the AIDS prodrome, and the final phase is the AIDS phase.