Plague Town by Dana FredstiRead about the other books on the list.
About the book: Ashley was just trying to get through a tough day when the world turned upside down.
A terrifying virus appears, quickly becoming a pandemic that leaves its victims, not dead, but far worse. Attacked by zombies, Ashley discovers that she is a 'Wild-Card' -- immune to the virus -- and she is recruited to fight back and try to control the outbreak.
It's Buffy meets the Walking Dead in a rapid-fire zombie adventure!
--Marshal Zeringue