history: We just adopted a dog from the shelter and I think she is sick with Parvo. We are taking her to the vet tomorrow to see.  We just adopted a dog from the shelter last week and I think she is sick with parvo. What is parvo?
current: It's a deadly dog illness, basically a virus that often leads to death. We think she caught it at the shelter.
next: That's terrible. Can you confirm it?