Porphyric Hemophilia (Oblivion)

The Vampirism disease. There are two ways to get this disease, which can bring you benifits. The first is fighting with a vampire and contracting it as you would any other disease. The second way is through the Dark Brotherhood faction. After reaching a certain rank you will be offered the chance to become a vampire, if you decline you can always ask again later. Poryphyric Hemophilia also drains your Fatigue 5 points. If infected and you wait for three days, the next time you sleep you will wake up a Vampire. If you do not wish to become a vampire, simply remove the disease -- by praying at a temple, or using a potion or scroll -- before the three days time has passed. For more information on being a vampire see vampirism.