I'm not sure how canonical is the existance of this curse. In Fantastic Beasts, Scamander says that "Humans turn into werewolves only when bitten", but the veracity of this claim is put to doubt in Deathly Hallows (chapter 11), in which Lupin voices his conviction that Teddy will be born a werewolf (even goes by to say that if the baby is not a werewolf, it'd be by "some miracle" - ironically, Teddy was not born a werewolf). Seeing as Lupin was a Defence Against the Dark Arts expert and a werewolf himself, his fears should not be as unfounded as that. If that is so, Scamander either made a mistake, or oversimplified matters in his work (due to the rarity of werewolf breeding, etc.) If we consider this, the existance of this curse could be, theoretically, canon. Still, I am unsure. It directly goes against a cold, hard fact written by Rowling herself, but did Rowling change her mind by the time she wrote Deathly Hallows? (if that is so, we should go by the most recent canon, per our policies) How should it be, then? This curse exists, and Scamander is wrong, or Scamander is right and this curse is totally non-canon? --  Seth Cooper  owl post! 02:25, December 30, 2011 (UTC)

That's a really good question. I'm not sure if it's possible to make a decision just based the information you presented, but I would add in this, which may help clarify things. Rowling intended lycanthropy as a metaphor for a disease, HIV, and we ourselves list lycanthropy as being a "magical illness." I don't recall there being any evidence in the series of it being possible to "curse someone with an illness," unless you count the Curse of the Bogies, and that just gives someone the symptoms of a cold, which I don't think would be difficult to duplicate without giving someone an actual illness. So if we are considering it a disease, then I would say that a curse that could inflict someone with the condition would be non-canon. On the other hand, it is possile to pass certain illnesses on to a child. ProfessorTofty 03:29, December 30, 2011 (UTC)
After the latest update of Pottermore, I'm more inclined than ever to simply say that this is non-canon and wash our hands of it. The information there states clearly "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." Furthermore, it states that those few werewolves who have married and children did not pass on their condition, so zap goes that. Lupin was simply mistaken due to the dearth of information. ProfessorTofty (talk) 23:03, August 19, 2013 (UTC)
Agreed; this should be deleted. --Hunnie Bunn (talk) 23:50, October 9, 2013 (UTC)