It wouldn't be modern it'd be historical because it would something that is going on in history then. It's recent outbreak because it is a modern themed thread. If it was a historical thread then the out break would have occurred centuries ago. Besides if this had been happening for years why would a vampire suddenly reveal themselves if they know that humans would hunt them down? That's a really dumb move and it would be a lame way for vampires to be discovered. If all of the sudden some person were to just say that they were a blood sucking monster by interrupting like a news crew, people would just label the guy as mental and make fun of them online. Nobody would take them seriously and the hunters wouldn't even be created over one delusional idiot or would be viewed as some weird religious cult. What would be the point of having hunters then?