If the test reveals a positive cytomegalovirus IgG antibody, drug therapy should not be used immediately, but further relevant tests such as checking the cytomegalovirus level in blood and urine, which can be performed by polymerase chain reaction. Antiviral treatment can be administered if the viral level is positive, especially if the viral level is positive and there are clinical symptoms, such as fever, pneumonia or organ damage such as hepatitis, when not only antiviral treatment but also symptomatic treatment is needed. Antiviral therapy can be given with ganciclovir and sometimes with acyclovir, and requires a physician’s decision based on the patient’s specific situation.