Modern zombie battle

Story: In the dark night of September 1942, a virus was born, it is called T-virus. This virus is spreading rapidly and become one pandemic worldwide, who are affected by T-virus will become one zombie, bloodthirsty and crave brains. Zombies are everywhere in the world, from urban to the military area. However, in some parts of the world, the people (commandos) who haven't been infected are stan…