There is 5 stages to the infection: *Stage 1*: severe headaches, blurry vision and swelling. *Stage 2*: vomiting, blurrier vision, painful headaches, throbbing head and weaker. *Stage 3*: your body changes, very weak, very bad headaches, even blurrier vision and swelling. *stage 4*: you start forgetting things and people, partially blind, vomiting and partially infected. *Stage 5*: Infected