S.O.
HAte to say it, but yes, it is normal. There is so much stuff that goes around day care, it's unreal! And some parents have to work---so their kids go to day care even when they are sick.
But this is the worst time of year for all that.
I quit working when my oldest was 6 months old, b/c he was getting sick and run down. If I ever had to do day care again, I would look for home day care where the number of kids is much much smaller and where the mom who sits has a firm policy on NOT taking sick children.