Cytomegalovirus (CMV) is a common herpes virus that infects people of all ages. CMV infection can be asymptomatic in healthy individuals, but it can cause serious complications in people with weakened immune systems, such as transplant recipients, HIV/AIDS patients, or infants infected while still in the womb. Research in CMV infection focuses on understanding the virus's mechanisms of transmission, immune evasion, and pathogenesis, as well as developing vaccines and antiviral therapies to prevent and treat infection. Additionally, researchers investigate the impact of CMV infection on host health and its association with various diseases, such as cancer, autoimmune disorders, and neurological conditions.