This RP takes place in the near future, about 50 years from now and starts after rouge Russian scientists created a bio weapon to use against the world in order to control the planet. But during the manufacturing process it got loose, and quickly mutated into a pathological abomination, then infected the entire compound. It quickly spread throughout the globe. Infecting animals, people and plants. Then resulting pandemic killed of about 75% of the human race and caused many plant and animal species to die out.6 months after the breach, the pathogen mutated  animals and people into flesh craving maniacs. This starts up about 1 year after the release and the remaining survivors must band together to survive the ruins of earth.