The exact origins of this affliction are unknown, some have said that it was a curse, some say it to be a disease, some have even said that these creatures are the result of an intimate coupling of man and beast. Regardless of how it came about the affliction changes it's victim, causing them to transforms into a half-beast half-man creature. These transformations, for the most part, come temporarily with only some becoming permanent. The werewolf loses control of themselves during that time, often turning to the beastial nature of their second half. Very rarely however, are those that retain their own mind when they transform, and rarer still are those that can control their transformations.
I've known the affliction to spread two ways, by either a bite from an existing werewolf or by drinking the blood of one, those that attempt the latter hope that they may be one of the few that can control it.
-Field Journal of Explorator Kincaid