Yes, I do. My dad has SLL, with a ridiculous risk of mortality should he be exposed. Yes, he's fully vaccinated, but the amount of protection he can expect from the vaccine is dubious.

Further bounding the risk of me getting exposed by a student (ventilation + masking) lets me both see my elderly father and continue to teach. I don't financially need to teach, and as much as I find it rewarding, I'm not willing to take a large risk of killing family members to do it.