Chapter 204: I Know Who I Am [bonus]
Regulus didn't say anything more. His mind was already turning over what he'd just witnessed.
Werewolves or more precisely, Lycanthropy.
A magical disease, not a natural species. Classified by the Ministry of Magic as extremely dangerous, impossible to domesticate. Though the danger only applied on the full moon. In human form, they were indistinguishable from anyone else.
Origins unknown. Some said Northern Europe, others Western Europe. Didn't matter now. They were everywhere.
Transmission was remarkably narrow. A bite from a werewolf in wolf form during a full moon, saliva entering the bloodstream. Scratches didn't count.
Bill Weasley had been clawed by Greyback in human form, and all he got were some wolfish preferences and a taste for rare meat. Never turned.
It wasn't hereditary either. Lupin's son Teddy came out perfectly fine.
No blood transmission. No fluid transmission. Two werewolves couldn't even produce a werewolf child.
Regulus found the transmission mechanics almost elegant in their specificity.