Cytomegalovirus (CMV) infection is a common viral infection that can affect people of all ages. It is caused by the cytomegalovirus, a member of the herpesvirus family. CMV infection is usually harmless and asymptomatic in healthy individuals, but it can cause serious complications in people with weakened immune systems, such as transplant recipients, HIV/AIDS patients, and newborn babies. Symptoms of CMV infection can vary depending on the individual, but may include fever, fatigue, sore throat, muscle aches, and swollen glands. In severe cases, CMV infection can lead to conditions such as pneumonia, hepatitis, encephalitis, and retinitis. Treatment for CMV infection typically involves antiviral medications to help manage symptoms and prevent complications. Prevention measures include practicing good hygiene, avoiding contact with infected individuals, and getting vaccinated if available. Overall, CMV infection is a common viral infection that can be serious in certain populations, and it is important for individuals at risk to be aware of the symptoms and treatment options available.