I'm in my 40s and haven't had to deal with any really crazy situations like this. It isn't just that there's a possibility that 1 person I love could die from this, there's a possibly that any of them could. And the older they are, the more likely that they could die from it.
On top of that, I can't spend time with them in the way that I would if I knew they were at risk. I have to stay away from them instead. It's the opposite of what I'd do if I knew a loved one was dying.
I think I'm dealing with it better than most because I'm an introvert. But I watch other people around me being affected by this, and I can understand it. It's a lot of new, different stress all at once.