If a student meets the criteria for exclusion and cannot be picked up, I will keep them in the clinic in order to protect the other students from exposure. Keep in mind this is after I have exhausted all avenues of having them picked up (grandma, aunt, sister, babysitter, etc.)
I am currently at a middle school and I have had parents say to let them walk home. I then have the parent speak to an administrator and get their approval. This never happened at the elementary level, so I was surprised when it happened here.