IIRC, canon!Harry met a vampire in book VI. Does anyone know if they exist in the MORverse?

My instinct would be that rational!Harry would have already encountered them while researching immortality - especially since he frequently compares the wizarding world with D&D, where the primary form of magical immortality is to become an undead wizard, or "lich", although I doubt he would actually accept immortality via vampirism - they may be bound by magical law (or at least the Statute of Secrecy) but I expect it still screw with your utility function, magic and social/legal status.

I don't remeber him explicitly dismissing this path, which could be conservation of detail, indicative that vampires don't exist in MOR, or me misremembering.