basically Friday the 13th but the pibby glitch is coming for ya, not Jason.

stage 1 of the infection: there's gonna be some initial shock and confusion from being infected. threat level: 23%.
stage 2 of the infection: wide grin, pure white eyes, keen eyesight and faster running, predatory hunger to spread the infection. threat level: 70%
stage 3: highly prone to mutations such as having a spike arm. Drooling.
stage 4 (last): mindless, aggressive predator that's unstoppable.