A Different Virus: Heartfire

In the future, everyone who's bitten by a zombie turns into one... until Diane doesn't. Seven days later, she's facing consequences she never imagined.

* * * * *

As civilization collapses under a relentless wave of zombies, Diane and her friends take shelter in a military base. However, while she's rescuing another survivor, Diane gets bitten by one of the monsters. She hides it and runs away, knowing she only has days left to live. But she soon discovers she isn't turning into a zombie, she's turning into something else.