I'm very curious about the extent that Raydon Labs is involved in the outbreak. The world wide outbreak and Ground Zero seem to have a geological source, which seems out of place for a pharmaceutical company. Also, the fact that "Raydon" in Raydon Labs sounds like Radon the gas, this whole mystery gets a bit cloudy.

Perhaps Raydon Labs is not the source of the outbreak, but instead a key to, either, Ink's power and the special zombies or a cure, or what every makes L.A. so different from the zombies found elsewhere.