Ugh. I feel for you. That's a tough position to be in, college is if possible even worse than grade school where mine are going. Even so in your case the risk is clear and present, and the University teachers are going to be a lot more likely to establish what their own risk appetite is than grade school teachers. This whole situation sucks. Way too many unknowns and too many people pretending there is no problem. I'm not looking forward to this winter. It seems like a perfect storm is brewing: COVID-19 resurgence, US Elections (which will generate a lot of friction no matter what the outcome), Brexit. This will be a rough ride. Hang in there.