.

Beside this, why didnt Bill Weasley become a werewolf?

Bill Weasley was bitten and slashed by a werewolf, Fenrir Greyback, in the Battle of the Tower. His face was severely damaged with magical wounds which might not heal properly. Because the werewolf was not transformed into a wolf, he will likely not become a werewolf himself.

Beside above, how did Fenrir Greyback become a werewolf? At some point in his early life Fenrir was bitten by a werewolf and infected with lycanthropy. Throughout most of his life, his only goal in life was to infect as many people as possible in order to create enough werewolves to dominate the Wizarding world.

Just so, how do people become werewolves in Harry Potter?

To become a werewolf, it is necessary to be bitten by a werewolf in their wolfish form at the time of the full moon. When the werewolf's saliva mingles with the victim's blood, contamination will occur.

Is Fenrir Greyback always a werewolf?

Fenrir Greyback is a werewolf who is involved with the Death Eaters but does not rank highly enough to carry the Dark Mark. He is known as the most savage werewolf ever to live and is greatly feared throughout the wizarding world, even by his natural allies.