The Sixth Extinction: An Apocalyptic Tale of Survival. Part Three: Infested.
A pandemic has swept the globe, decimating humanity, affecting all who breathe in its deadly spores. There are four stages to the virus. The third stage, where the host human becomes a frenzied, animalistic eating machine, is sweeping the country.
The spore pandemic has been expected and prepared for by the government for over a hundred years, ever since the first pod was discovered in 1898.