In Left 4 Dead, what is the name of the virus, as designated by CEDA, that causes most humans to turn into the Infected?

The answer is Green Flu because in the game Left 4 Dead, the virus that causes most humans to turn into the infected is referred to as the Green Flu by CEDA (Civil Emergency and Defense Agency). This designation is given based on the color of the infected's glowing eyes, which appear green when they turn.