Poison

Aliens can temporarily carry Poison. While they have it, any Human they hit will become poisoned for a while, taking damage during that time. Poison can be obtained from a Booster. After touching a Booster, the Alien will have Poison for 20 seconds (?), touching the Booster a second time will reset the counter (?). A Human must use his Medkit to remove the poison before the effect wears off by itself. The Human will then be immune to new poisoning for 30 Seconds (?).