Due to what some people may call a small unfortunate happenstance, humanity caught a bit of the fungi fever and things got a little out of hand. The infection kept spreading, and things were looking... not great.
Well, wouldn't you know it, a vessel crashed into the Earth during all of this and as some soldiers and scientists went to investigate they discovered the vessel was not human and also empty. Shortly after, all contact was lost with the team and not long after that, a new type of infected human began spreading throughout the world alongside the current terrestrial problem the planet is dealing with.
"Well, if you can't beat em, join em!" nobody said, but they all did anyway! Humanity is extinct and all that remains are billions of infected of both varieties.
Problem is, they can't seem to get along. The Cordyceps managed to infect 85% of humanity and now they are thinking that they can easily beat up on the smaller Flood Humans. At least that's what I think, I don't know, I'm already dead.
Who do you think wins, and why, and which side do you want to be on?