I'm so very sorry for your loss. My heart goes out to you. What a devistating disease!
I believe they can occasionally get it even though they've had their vaccines. I wouldn't get another pup for long time, until it's gone from the soil and outside. It would be very difficult to bleach everywhere the dog has been. That is a horrible virus.
Your pain will lessen with some time. I'm so sorry you're feeling like this now...so sad.