Becoming one can happen in two ways: a young child is bitten by Lobizon or a seventh, male child will be given the curse of becoming one. Though mainly venom is a main key in turning a sweet child into a blood thirsting creature, rarely a family with a seventh male child does occur. The only way to make sure the child doesn't become one, the Argentina government asked families who have a seventh male child to become baptized to avoid the curse of becoming a Lobizon.
The Lobizon (or sometimes 'El Lobizon') are mainly found throughout Argentina and had became an epidemic for human safety. The Lobizon are mainly found in the northern region of the country and don't only terrorize rural farm lands but, populated places as well.