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Hello from JustAnswer.
Are you having any abdominal pain? Or any tenderness in the right upper abdomen?
Do you know which blood tests were done?
Thank you for the additional information.
There are several conditions to consider in this situation. Checking a complete blood count and glandular fever would be appropriate. However, another consideration would be whether there is any liver involvement. There can be involvement of the liver with many different viral infections. Certain viral infections primarily affect the liver, so are called hepatitis viruses. However, the liver can also be affected with other viruses. It is only rarely affected by RSV. It is more often affected by the virus that causes glandular fever, occurring about 25% of the time.
Loss of appetite and nausea are common with liver disease. There would be more of a concern if there is upper abdominal pain or tenderness. However, if the complete blood check does not include liver function tests, it still would be appropriate to do so.