If there is one thing we do know, it is that Arugal is responsible for worgen within Silverpine--be it his own machinations or otherwise. What we don't know is how it spreads.
While I research a way to stop the curse, our first priority is to contain it. It appears this affliction cannot infect forsaken, but a large group of humans have gathered by the Greymane Wall.
Go to the wall and put down these refugees before they have a chance to become servants for Arugal. And try not to get bit, <race>.