Cytomegalovirus, abbreviated as CMV, is a common virus that can infect people of all ages. Synonyms for the word CMV include human herpesvirus 5 (HHV-5) and salivary gland virus. Because CMV infection is often asymptomatic, it can be difficult to detect without proper testing. Common signs and symptoms of CMV include fever, fatigue, sore throat, and swollen glands. However, people with weakened immune systems, such as those with HIV/AIDS or organ transplant recipients, may experience more severe symptoms. Overall, it is important to be aware of the potential risks of CMV and to seek medical attention if any symptoms appear.