This is so hard because we aren't hired to be babysitters... I had a diabetic who kept skipping school before getting her insulin. One time she was in the 400's and at home alone.
Mom asked how she left school. I just replied "ma'am, we have 1.400 students, 3 principles, 3 security guards and 1 nurse. We can't keep an eye on one student in particular".
I firmly believe we can't force the kids to do anything. You can only educate the best you can (and document). So you are basically giving them a platter with options, yet, you can't force them to take anything.
As far as an escort, for my kids we saw they require an escort if they aren't feeling well.