Do you think they'll let us contract vampirism in the finished game? Asterion is Baldurian so it would make sense that his sire Cazador is also Baldurian and according to Asterion only true vampires can turn others into vampires.
To be transformed into a vampire, you need to be killed by the bloodsucker, then buried for him to transform you into a vampire spawn. Can be done, but its seems a bit complicated uh. Also, being turned into a vampire spawn by a vampire means you ll be his servants, so there would be something like If Astarion like you enough, he ll turn you into a real vampire, but if he don't, you ll just be his pet and its game over. But well, why not.