Porphyric Hemophilia
Known as the "vampire's disease", Porphyric Hemophilia will become vampirism after a three day incubation period. By itself, the disease affects the victim's stamina, but on the third night of infection the victim will die and become undead. The disease can easily be cured within the three-day period, but vampirism is notoriously hard to cure. The disease is similar to the less-common Sanguinare Vampiris and Noxiphilic Sanguivoria.

Sanguinare Vampiris
Similar in nature to Porphyric Hemophilia and Noxiphilic Sanguivoria, victims of the less-common Sanguinare Vampiris will become vampires after a three day incubation period. By itself, the disease negatively affects the victim's health, but on the third night of infection the victim will die and become undead. The disease can easily be cured within the three-day period, but vampirism is notoriously hard to cure. Sanguinare Vampiris is found in the province of Skyrim.

Noxiphilic Sanguivoria
Noxiphilic Sanguivoria is a strain of vampirism that was common during the Second Era. Unlike other vampiric diseases such as Porphyric Hemophilia and Sanguinare Vampiris, vampires of the Noxiphilic Sanguivoria strain are not weakened by daylight, but are instead strengthened during the night. Complete transmission of the disease requires that a vampire not only bite his or her victim, but also drain the victim's blood and replace it with the vampire's own. If the victim can escape before this process can be completed, the disease can be treated by a priest of Arkay.