From a friend, a few days ago:

We were supposed to be in Vienna today for a short vacation, but the city is at high risk and we would have had to be quarantined on the way back.

The hotel refused to refund the payment. I called and asked to extend from 3 nights to 10 nights. When they asked the reason, I replied that I just got back from Italy and am looking for a place to stay until the 14-day quarantine period is over. “I want to stay in one place and not move around,” I told them.

They canceled my reservation immediately.