The Infection (TF2 Fanfiction)

After a parasitic substance is discovered in a closed off cave under the dustbowl, the world is swept with a series of infections that causes the victim's mind and body to warp into something completely unrecognizable. In an age of despair and suffering, the only survivors are some of the most strong, athletic, and highly trained mercenaries that you may be familiar with. With society on the brink of collapse, the fate of humanity is now in the hands of the iconic dim-witted mercs.