stage 1 a person at stage 4 latches on
stage 2 the infected person who latched on to you falls off and you get more happy and blood comes out of were the infected latched on
stage 3 you become hostile and will kill survivors though some can control it
stage 4 your completely under ITS control you can still feel see hear and talk but if someone gets to close you will latch onto them

we have loreeeeeee