Dawn of Eden (Blood of Eden #0,5)

Before The Immortal Rules, there was Red Lung, a relentless virus determined to take out all in its path. For Kylie, the miracle of her survival is also her burden - as a doctor at one of the clinics for the infected, she is forced to witness endless suffering. What's worse, strange things are happening to the remains of the dead, and by the time she befriends Ben Archer, she's beginning to wonder if a global pandemic is the least of her problems....