Cytomegalovirus infection is not pre-AIDS and there is no direct correlation between the two. Cytomegalovirus, so named because infection causes cells to become larger, can be transmitted through saliva and therefore has a high rate of positivity in the population. In general, cytomegalovirus is basically non-pathogenic, and cytomegalovirus infection is likely to occur when the body’s immunity is particularly low. AIDS is caused by HIV infection, which attacks the immune system, causing the body to lose its immune function, making it susceptible to various diseases and malignant tumors. When the resistance of AIDS patients is low, they may be infected with cytomegalovirus and develop omentitis, pneumonia and gastrointestinal infections, but there is no direct correlation between the two. Therefore, there is no direct relationship between cytomegalovirus infection and AIDS. A positive test for cytomegalovirus can only indicate infection with cytomegalovirus rather than AIDS.