Fenrir achieved his vengeance by attacking Lyall's son, Remus, which cursed the boy into a life as a werewolf before Lyall managed to repel him with a flurry of curses. This attack did lead Lyall's bigoted views on werewolf to change, as he continued to love his son regardless.
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. However, when Albus Dumbledore became headmaster, he let Lupin go to Hogwarts.
However, when Bill Weasley was attacked by Greyback, he avoided the perils of becoming a werewolf because it wasn't a full moon. Greyback simply left Bill significantly scarred and with a new appreciation for rare steaks.
What happened two years earlier? Oh yeah, Snape “accidentally” let slip that Lupin was a werewolf. Snape was probably bitter over the whole not being able to kill Sirius Black and losing the Merlin.
Because he was in his dog form while fighting with Remus. In order to protect Harry, Ron, and Hermione from Lupin, Sirius turned back into a dog. Werwolf can turn a human into a werewolf by biting them, but not animals.
It was the act of murder in this way that made him descend into a more bestial image. The reason why Greyback is more wolf like is because he enjoys being a werewolf to the point that he would sharpen his teeth and nails to appear more like the form he takes on a full moon.
The potion was the only thing that made Lupin accept the position of the DADA teacher: He was only persuaded to accept when Dumbledore explained that there would be a limitless supply of Wolfsbane Potion, courtesy of the Potions master, Severus Snape.
She became a werewolf and went into hiding! Except Fenrir never bit her.
All first years are then 11 at the beginning of the school year. All second years are 12 at the beginning of the school year. And so on to 17 years old at the beginning of Year 7.
In the United States, ninth grade is usually the first year in high school. In this system, ninth graders are also often referred to as freshmen. It can also be the last year of junior high school. The typical age for U.S. 9th grade students is 14 to 15 years.