Updated: Mil gave my 9m old Covid

My mil allowed us and our daughter over for Christmas and didn’t bother to tell us they had symptoms of Covid until we left. They went and got tested Sunday and came back positive. They had symptoms the day before Christmas and knew!!! I’m so fking pissed but I’m worried about my baby. I started with dizziness a while ago but I’m wondering if anyone has any advice for a baby with Covid? I want to be prepared.

My boyfriend and I both tested negative two times yesterday and my daughter has no symptoms. Will be getting another later in the week to be safe but so far everyone is healthy!