Originally Posted by ModernSith2010
What, how do you become a vampire as I want to avoid it, or is it to get an achievement
No achievement for becoming a vampire. You can catch the disease when fighting vampires or through the Mehrune's Razor DLC quest. The Dark Brotherhood also has an opportunity to instantly become a vampire (very clear choice, not something that just happens). You can get the disease cured at chapels. Just make sure you check your effects and get cured when you fight vampires. You have 72 hours after contracting Porphyric Hemophilia to cure it like any other disease.