Blood tests cannot detect AIDS. Routine blood tests are commonly used for clinical monitoring, mainly including red blood cells, white blood cells and platelets, including their respective counts and classification, and the proportion of each. Blood tests are widely used in clinical practice to detect anemia, infections and thrombocytopenia. AIDS is a common infectious disease that is contracted mainly through unclean sexual contact and blood exposure. Infection with HIV can cause progressive damage to the body’s immune function and eventually lead to various tumors and infections. AIDS is a very difficult disease to treat, and screening for AIDS requires antigen, antibody and viral nucleic acid tests to clarify. Routine blood tests are of no particular value or diagnostic significance in the diagnosis of AIDS. However, in the process of HIV infection or disease onset, routine blood tests can be useful for understanding part of the disease or the co-infection of specific infections.