Why didn Jace become a vampire after Simon bit him?
City of Ashes, p. 192: “You might remember that when [Simon] was in the form of a rat, and you came to fetch him from us, he bit me,” said Raphael. “In any case, he took some of my blood into his mouth when he did it. You know that is how we pass our powers to each other. Through [VAMPIRE] blood.” Jace isn’t becoming a vampire because he didn’t ingest vampire blood. Simon became a vampire because he did.