I'm the same. I make sure my own kids get lots of the right vitamins so they're fighting it off. It's usually my daughter who brings it home from school anyways.

I don't close unless I'm physically unable to take care of kids. If my kids come down with something I always send the parents a text in the morning letting them know what it is and I'm open regardless, but if they choose to stay home they will not be charged for the day.

This week I have 2 with runny noses and coughs when they lay down, my own little guy has a cough too (and a ton of hives eek)

I make sure the bedding is changed regularly while everyone is runny too.

Hope your few days off resets everyone and next week starts off better.