Non on ne peut pas.
Etre loup-garou immunise contre toutes les maladies, y compris le Sanguinare Vampiris (Vampirisme).
En revanche, devenir loup-garou annule le vampirisme si vous êtes un vampire.
"Upon transforming into a werewolf for the first time, you automatically cure all the diseases you may have acquired. It will even cure you at any stage of vampirism. This means you cannot be a vampire and a werewolf at the same time. You also become immune to all diseases in your beast and human form, meaning you cannot contract Sanguinare Vampiris until you are cured of lycanthropy."
http://www.uesp.net/wiki/Skyrim:Lycanthropy