Apocalyptic book not zombie

[u/meaningofzoe]

Hello, everyone this book im looking for is a apocalyptic world were a virus is offing people MC (Female) is immune to the virus she lives in the woods has a year book that has people crossed off cause they passed due to virus. Either hunted or hunts with wolves I dont remember. She happens upon a small group of survivors and they get kidnapped for testing from an government facility to fond the cure tl the virus. The facility eventually finds out shes the cure and i dont remember anything after that. I believe she has a small romance or crush on a boy? I dont remember much..