The process for removing lycanthropy in Ravenloft was very involved, and had a reasonable chance of failure (in which case the person was permanently afflicted). First you have to kill the werewolf who infected them (and it has to be the master lycanthrope---if they were infected by another infected lycanthrope, you have to keep going back further in the chain until you find the original source of the outbreak). Then the infected character has to perform ritual cleansing. After that he or she must assume his wolf (or whatever beast it is) form. Then you have to cast atonement, cure disease and remove curse. When this is all done, the character makes a saving throw versus death (rather than polymorph). If the character fails the save he or she remains a lycanthrope (and also experiences excruciating pain) and does not get a second chance to be cured.