Thanks very much for all your response, my son is OK now, I just gave him congee and lots of fluid. He has started drinking milk (less diluted) and is OK, though he is still not eating much, I think it will take some time for him to recover, at least he has stopped vomitting, which really kills me when I saw how uncomfortable he gets.
But I really don't know what causes him so, I think he has picked it up from school, because he just ate the same thing when he gets home.
But I really don't know what causes him so, I think he has picked it up from school, because he just ate the same thing when he gets home.