Getting the disease requires the Nerevarine to be attacked by a Vampire.
- Restore Fatigue – 1 point on self.
- Visiting a Tribunal or any shrine.
- Visiting a healer.
- Using any potion or spell that cures common diseases.
Once the Nerevarine is a vampire, the only way to cure Porphyric Hemophilia is to do the quest called A Cure for Vampirism. Once the quest is completed, the Nerevarine will be cured of their Vampirism, and be unable to contract it again.