Poison is a special effect your weapons can cause aside from initial damage inflicted. It drains the affected trooper's Health Points by 1 per turn, gradually resulting in a loss of 6~10 HPs.
Analysis
Poison is one of the most effective ways to kill an enemy, troopers and rats alike, due to steady rate of damaging and lack of effective ways to counter it, aside from 
Doctors' immunity or HP upgrades. Mass poisoned enemies most often end up dead, which makes extensively utilised toxic munitions comparable to explosives. And such, friendly fire is even more perilous among your ranks.
Ways of Contraction
- Being shot at with
Toxic Shells. - Being caught in an area of effect of
Gas Grenade. - Taking
Twinoid, Doctors are not immune to it.
