Doctor

The doctor has a number of immunizations that they can hand out during the day by using  in PM. The immunization will prevent the receiver from ever turning into a wolf. Immunizing a lycan reverts them into a normal villager. Additionally, whenever the alpha wolf bites anyone that is immunized, the bite victim will die instead of being turned into a wolf. Be wary, however, because if you immunize someone that has already been bitten by the alpha wolf you will simply accelerate them turning into a wolf instead of curing them!

Related roles

 * Alpha wolf