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EBV is one of those conditions where all you can do is manage the symptoms. High dose vitamin C supplements will help the immune system, ensuring he is eating protein and carbohydrate to keep his energy levels up. Plenty of fruit, pureed if necessary. Ice cream and cold drinks are good for the sore throat. If its difficult to swallow then local anaesthetic throat lozenges with benzocaine or lidocaine would be good.
If the inflammation is very bad then steroids are occasionally used.
When he feels like getting up, he will need to take it easy for a few weeks as he will feel really tired eg sports games may really exhaust him.
Recovering from EBV can take up to 4 months but fatigue longer than this will need further investigations.
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