@thesteelrat
Yeah, I've never subscribed to the idea of vampirism as a pathogen communicated by bite. Even if vampires don't need to eat very often, it just doesn't make sense, as you say. So vampirism is often made out to be something that must be consciously transferred, as in Anne Rice books. Still, if a werewolf ingests vampire blood, does that count?

I think vampires are mostly immune to pathogens for the same reason dead bodies are: they're dead. But lycanthropy isn't a traditional virus, typically. If it's "contagious" at all. Some lycanthropes aren't. So maybe a werewolf can't turn a vampire, but can a vampire turn a werewolf?