Because I will not be doing this every couple of pages, I'm just doing the quick outline and referring to this post from now on, I suggest others do the same.
Jubilee became a vampire in the 2010-2011 X-men storyline "Curse of the Mutants", where Dracula is killed by Xarus, one of his children, and who begins to unite the various vampire clans and sects. At the same time, a depowered Jubilee (one of the many mutants who lost their powers in the 2005 storyline "Decimation") is in San Francisco's Union Square when a human bomb explodes in the square, covering dozens of people in blood. Soon afterwards, it is discovered that the blood carries a manufactured virus and eventually turned into a vampire by Xarus. Mainly this was so Jubilee could act as bait for the rest of the X-men, especially Wolverine. Long story short, the X-men win, Xarus is killed, Dracula lets the X-men take Jubilee and she remains a vampire.
Jubilee would remain a vampire until a 2018 storyline where (yet again) the Xavier Institute was attacked while Jubilee was acting as a mentor. While fighting off the attacker, Jubilee was thrown out of a window into a sunny afternoon, Quentin Quire used the last spark of the Phoenix Force in him to save Jubilee, curing her of her vampirism and restoring her powers.
