Oh, absolutely - in fact the main reason I mentioned Nineveh's fic was that I thought you might enjoy comparing treatments.

I suppose the Basilisk attacks have been the nearest we've come to 'illness sweeping Hogwarts', though they didn't really offer much in the way of slow convalescence and games under Matron's eyes... There's a good 'flu epidemic in Jane Gardam's Bilgewater - which I'd heartily recommend full stop if you haven't read it.