I feel like other cultures predating Jesus would have had stories about humans who suck blood, and are undead. African cultures had zombies e.g. but that’s not quite the same thing. Probably South American like Mayans and Aztecs had similar myths. Though I’m guessing they probably didn’t turn into bats. Or does that concept also transcend cultural myths?

Maybe vampires were unstoppable before Jesus. So not only did he save us from sin, he also saved us from vampires.