Q. How does Lycanthropy & silver weapons work in TD?
A. If a player is hit by a were-creature with a melee attack they must have a DC-15/20/25 (Normal/Hardcore/Nightmare) Fort save or she is infected with the magical disease for the rest of the adventure. This means that on the first round of any subsequent combats that the infected character must take no action during the first round of combat -- other than take the round to calm themselves and resist the urge to go into their were-form. The magical disease can be prevented by some methods, and cured by others.
Silver weapons do no extra damage to were-creatures. Damage from Silver weapons cannot be regenerated nor magically healed by lycanthropes.