How Lupin Become a Werewolf?

He was turned when he was four years old. Remus was turned by Fenrir Greyback, who sought revenge on his father for his unkind words about the werewolf community. The attack took place just before his fifth birthday, and although Lyall burst in and saved his son from death, the attack left Remus as a werewolf himself.

Why did greyback bite Lupin?

At the age of 4, he was bitten by the foul werewolf Fenrir Greyback when his father-Lyall Lupin- insulted all werewolves. Fenrir tried to kill him but Remus got saved by his father. ... He had a tunnel built so that Lupin could sneak out of the school during the times when he became a werewolf.

How did Lupin get cursed?

Lupin's father, Lyall, worked for the Ministry of Magic. During the trial of Fenrir Greyback, Lyall was the only one to realize that he was a werewolf. ... The result was Remus being cursed with lycanthropy for the rest of his life at age 4. It was a bitter wake-up call for Lyall, who was unable to cure his son.