3 Hours till Dead (2017)

An AWOL soldier with PTSD goes into hiding along with his brother and a few friends They retreat into a rural farm area unaware that the outside world has ceased to function On their way back to civilization his brother is attacked by an infected farmer He quickly morphs into a rabid animal and lives for exactly three hours Realizing they are in grave danger they head back to the forest trying to outlive the legions of the infected