The asymptomatic or incubation period is the period before the onset of AIDS, when the patient has no symptoms but has HIV in the body and is tested positive for HIV. For this group of people, regular monitoring of CD4 cells and HIV count is required. If antiretroviral treatment is indicated, it is necessary to administer it in a timely manner, otherwise some patients will enter the AIDS stage as their disease progresses. Many patients in the AIDS stage will develop various opportunistic infections, and then may be at risk of life-threatening because the opportunistic HIV infection cannot be cured. After antiretroviral treatment, most AIDS patients are stable and the number of HIV viruses continues to decline, and the chances of opportunistic infections are significantly reduced.