Patients with AIDS can develop anemia. However, the onset of anemia usually occurs after the onset of AIDS, but not in the early stages of the disease, such as the acute and asymptomatic phases. During the incubation period, patients can work, live and study like normal people without any obvious symptoms. It is only after the incubation period that the patient’s immune system is severely weakened, resulting in various opportunistic infections, malnutrition, fever, night sweats, diarrhea, etc., which can lead to anemia. Severe patients may lose weight to a few dozen pounds and eventually die due to secondary infections.