HIV is the AIDS virus, which causes AIDS when it infects the body. HIV is an infectious disease that mainly destroys the body’s immune system, causing a continuous decline in CD4 cells, which causes a decline in immune function, which in turn leads to various opportunistic infections or tumors. Therefore, patients with HIV infection need to be treated promptly. There are three main phases, the first phase, the acute infection phase. Phase II, the asymptomatic phase. The third stage, the AIDS stage. Once HIV infection is diagnosed, regardless of which phase you are in, you should receive antiviral treatment as soon as possible.