Medical tests should be done every three to six months, depending on the type of infection and the severity, according to the World Health Organization.
The tests include an enzyme test to see if someone has the virus, and the polymerase chain reaction test to check for the presence of the virus in the body.
The first tests, which take less than an hour, are usually done on a cold day or in a hospital setting.
A second test can be done up to three weeks later.
A third test, usually done within six to 12 weeks, can detect whether someone has contracted CMV, or whether their symptoms have improved.
The third test can also detect whether a person has been vaccinated against CMV.
The most common CMV symptoms include fever, muscle aches, cough and cold.
The virus is also contagious, and can spread through the air.
There are no immediate symptoms and symptoms may last for days, weeks or even months.
The WHO recommends testing for CMVI, a more severe form of the infection.
People with the virus who do not test positive should not return to work or school, or should get tested regularly.
If they do test positive, they may be referred to a specialist, such as a gastroenterologist.
For some people, the virus can also cause severe and life-threatening conditions.
Symptoms include fever and headache, joint pain and fatigue, muscle pain and weakness, and weakness in one or both legs.
People should seek medical advice and seek medical treatment if they have any symptoms that are severe, including but not limited to: chest pain, back pain, nausea, vomiting, diarrhoea, severe diarrhoeas, muscle weakness or weakness in both legs, fever, a fast heartbeat, a sore throat, difficulty breathing or shortness of breath, loss of consciousness, confusion, or difficulty thinking.
People who do get sick should seek immediate medical attention.