The average incubation period of HIV is 9 years. Some people can have a brief acute phase reaction during the incubation period, similar to the symptoms of a viral cold, and some people do not have any signs and symptoms during the incubation period. AIDS incubation period is longer, the average time is 9 years, some people in the HIV infection can enter the asymptomatic incubation period, without any symptoms and signs, performance and normal people are no different. Some people can have transient acute-phase reactions such as headache, sore throat, myalgia, arthralgia, etc., similar to viral colds, which can usually be self-healed after 2 to 4 weeks of HIV infection. AIDS is more prolonged from the initial HIV infection to the terminal stage, during which medication should be carefully followed to relieve complications and for long-term survival.