My son has been sick this weekend. He's had flu symptoms along with a fever of 103. All day today…

My son has been sick this weekend. He's had flu symptoms along with a fever of 103. All day today with no medication his temp has been under 100. He feels better. I'm keeping him home from school tomorrow to recover.

My question is how long do I have to wait to bring him in public??? I have a OB appointment in the am too late to cancel, but I don't want to risk others

HELP!! TIA 💗