According to the NHS guidance website:-
"The symptoms of tonsillitis usually get better after three to four days"
Unless you're a footballer.
I would expect so but who has the final decision? I have had tonsilitis as I suspect many have. I found it irritating and unpleasant but it didn't stop me from going to work. Izzy has been easily our best player and I see no reason why we wouldn't have wanted him to play even if he was only 80%.