THE GREY ZONE. The first Grey Zone characters are prions, a “quasi-species”. These things are very perplexing. They are just misfolded normal cellular proteins ( chains of amino acids) that have the ability to mutate and evolve. They are infectious proteins that can induce normal proteins to become infectious by adopting their misfolded shape, and thus are self-propagating. Curious, to say the least. A serious head-job.