Proper Etiquette?

Am

I already bought everything to make a pumpkin pie, green bean casserole, and 2 appetizers. One of our kids now has a 101.4 fever.

I think I need to back out of going to visit my family. My 2 nephews will be there and I don't want to spread anything.

Do I still need to go drop off the dishes I volunteered to bring? I kind of just want to make it and feed my own family...I can just go get some rolls and a ham and call it a day. What is proper though?