Just because HIV CD4+ T cells are normal doesn’t mean it’s okay. AIDS, known as Acquired Immune System Deficiency Syndrome, can be divided into three stages: acute HIV infection, asymptomatic HIV infection, and AIDS. In the acute phase of AIDS, there is a transient decrease in CD4+ T lymphocyte count. During the latent, or asymptomatic, phase of AIDS, CD4+ T lymphocytes can approach normal values and gradually decline. In the AIDS stage, CD4+T lymphocytes will drop significantly, and the CD4+T lymphocyte count is more <200 cells/μL. AIDS is incurable in human medicine, so prevention is very important. Taking blocking medications within 72 hours of HIV exposure can reduce the risk of HIV infection by minimizing the risk of HIV infection. The earlier they are taken, the more effective they become. Effective antiretroviral therapy can result in CD4-T lymphocyte counts that can gradually rise to 500 or more per μL, close to or at the level of a normal person. Normal CD4+ T-cells before treatment does not mean that you are fine, and aggressive treatment is needed.