Cytomegalovirus in adults is mainly transmitted through medical infections and horizontal transmission. 1. Medical infections: Adults who receive blood transfusions from cytomegalovirus-infected patients or organ transplants from cytomegalovirus-infected patients are at increased risk of cytomegalovirus infection. 2. Horizontal transmission: Cytomegalovirus may be transmitted if a healthy adult has sex with a cytomegalovirus-infected patient. In addition, healthy adults may also be infected with cytomegalovirus when they come into contact with the urine and saliva of a cytomegalovirus-infected person. It is recommended that adults who develop cytomegalovirus infection need to seek prompt medical attention, and doctors will choose appropriate measures to treat the patient’s condition. For example, antiviral drugs such as ganciclovir and cidofovir can be given to the patient under the guidance of the doctor. In addition, adults should avoid having sex with patients infected with cytomegalovirus or coming into contact with the patient’s body fluids.