S.G.
All I can say is that this Fall/Winter season(s) have been very challenging for our house, too. My son is in K, and has picked up every virus that came in from the sick children that came to school.(Moms~will you keep your sick ones home, please!I do!) He'd have a bout of vomiting for 24 hrs, then be fine, and then the next week have diarreha for a few days.Or an awful headcold. Or whatever it mutated into! Yes, I kept him home, obviously! On and off...this whole school year! I feel lucky, as he hasn't had pnemonia! He is home now with the last day(hopefully) of a low grade fever. Head cold with chest congestion. Keeping any eye on him. Praying it will go away! These "gifts" are not welcome!
As far as your son goes, keep him fully hydrated with water/juices...having a fever will wipe out his fluids. I make sure G. is drinking 6 ozs. or so every hour or so. Good Luck and let's pray that this Winter's bugs will go with it! Hello Spring! :)