I was taking some advanced graduate classes - god, that sounds like I'm bragging, doesn't it - and working on this device I invested that cancels the mental abilities of vampires in my world. Only my boss figured out how to make it totally incapacitate the vamps, because she worked for an evil corporation that just wanted to get rid of all the vampires. They had this kind of "cure" for vampirism that might have been pretty interesting if it didn't kill more than it helped.