Deus ex Morbus a free zombie serial
Deus ex Morbus takes place in a world that was devastated by the Disease whose original purpose as a bio-weapon was to cripple the infrastructure of the United States. However, alterations were made to the genetic code that allowed those that unleashed the Disease to wreck havoc on the entire world and turned most of the planet’s population into mindless cannibalistic monsters whose only purpose is to propagate the Disease.
An epidemic has ravaged the United States, turning its citizens into ravenous cannibals. While a group of uninfected survivors flees towards safety, they learn the devastating truth behind the outbreak.