As much as we would like to get back to cruising once again we'll be waiting for vaccine before we even think about venturing back again.

Although they're expecting something to arrive in 2021, we'll still wait until they begin cruising without any incidents for many months. My thinking is that if an outbreak is to happen, it'll occur on a cruise ship since it's just about impossible to avoid contact with other people.
I'm hoping that Princess will still be around in a few years but the way it looks I'm not sure they can hold out that long.