The problem isn't vampires we caught coming back. The problems is vampires someone caught fifty years ago coming back.
A random farmer cuts his hand while raising a new barn and surprise, there was a vampire buried where he is digging the foundations! A new village is wiped off the map and we only know about it after a few weeks or months.
Or hell, a new village welcomes its vampire overlord as things get back into their "right and proper" state, and you are now able to work towards becoming a superhuman immortal too!