Staying Human by Adam Bolander

It's the year 2047, and a virus is turning anyone it infects into rabid animals. The human race is on the brink of extinction. This is Eve's story, a woman struggling to hold onto her humanity while the virus wreaks havoc on her body. Living in a human tribe that needs her only a little more than they fear her, Eve's only friend is the spear she hunts with. When she meets a wolf-hybrid named Bastian in the wild, the mysterious young man takes it upon himself to show Eve that she still has a reason to live, even if it isn't as a human.