How do you cure vampireism on oblivion

\There's two ways I know of. One is through the vile lair add on. The other is through a quest. to start you should talk to a few people about vampireism. Eventually you'll be directed to a count (in Skingrad) He'll send you to a witch, she want's a lot of things, you need to get them for her. once done you'll need to wait a day (but you can't in her house so this may cause some problems seeing as you can't wait outside either) after a day you'll get two potions, one for you (you can drink it whenever you'd like) and one for the count, take it to him, he'll give you gold and you're done. Also you won't be able to catch vampireism again