Hello ladies, I’m just wondering when everyone thinks it would be safe for me to leave my little “quarantine” bubble

My 4yr old got vaccines on Thursday, then later that night she started throwing up every where. So me and my newborn have been locked up in our bedroom, just to be safe.

Today is now Sunday, and so far, no one else (my husband, 2yr old and 4yr old) has showed symptoms of being sick and the 4yr old hasn’t thrown up since Friday morning.

I’ve been in hiding because I have a 10 day old baby, and since we aren’t sure what caused her to throw up, I haven’t wanted to risk anything. When would be safe to leave the room?