WWYD? Sick Kid in Christmas

4yo started running a fever. A bug has been going around her school - I'm sure that's what she has. Seems like a virus with 2-3 day fever and a bad cough. What do I do? I'm sure my parents will want me to give her Tylenol and still come to Christmas, but I don't want to get my nieces and nephews sick. Do I let my other kids go and stay home with the sick kid? Keep everyone home? Delay/reschedule Christmas with grandparents? Or open gifts at home via Zoom? These situations and decisions absolutely stress me out. It's so hard keeping everyone happy at the holidays.

Edit: I should clarify we won't go unless fever free for 24 hours. I'm more seeking advice on the best alternative options for making Christmas special for the kids and making grandparents happy.