The chest pain is one of the symptoms of Angina. This is the weakest enemy unit in the game. Its only advantage lies in number. Angina never run alone. You can meet the large groups of Angina in early stage of the game.
Cold primarily affects the nose but you can meet this virus everywhere in the game. Cold attacks from the earliest game stage, it is tougher but slower than Angina.
Flu brings pure discomfort to your body – chills, fever, runny nose, sore throat… It is slow, pretty tough and the damage is also something what you should consider. Moreover, it is necessary to kill it twice while the Flu has ability to divide in 2 smaller warriors after death.
Miniflu is one of 2 descendants of the Flu. They appear in battle after killing big Flu to revenge its death. Good for you they are weak.
Nicotine belongs to very dangerous and highly addictive stimulant drugs. Nicotinic´s special ability can force you to rethink the build order of towers. The think is Nicotinic becomes invisible after the first hit and it is immune to attack while invisibility lasts.
Tapeworm is parasitic unit usually attacking digestive tract. It moves slowly but despite this it is difficult to kill it due large number of hitpoints. Even its attacking damage is dangerous.
Stonekid is the very first boss you will meet in the game. Origin of its name can be found in the core of Stonekid´s existence – solid concentration from minerals formed in kidneys. Stonekid is huge and seriously tough unit which can crush your troops like grapes.
“Pro” in the name of Angina indicates something special. In this case we are talking about hovercraft. Yes, Angina riding this special machine. Its movement speed is increased as well as durability.
Second level of the Cold is better prepared to fight against your units. First of all it has more hitpoints and quite high damage. Fortunately the movement speed remains slow so it can´t ran away from your firing towers.
Alcohol A is not very dangerous unit in case it stands alone. It has quite fine number of hitpoints but cannot move very fast so Alchohol A should not pass through your defense.
Alcohol B is next part of complex Alcohol. This unit is faster then its companion but only few shots are enough to annihilate this enemy. Do it fast and avoid to meeting of A and B alcoholic unit.
There is no problem to keep Alcohol A and B separated for cautious commander. But in midgame stages can Alcohol appears as a complex. It has great resistance and descent damage which makes it really tough enemy.
Cholesterol is not essentially enemy for human body. But too high concentration can seriously affect heart for instance. In our case Cholesterol is not tough and destructive only. Its main ability is to support other companions by increasing their armor. If you see blue circle around enemies you can bet the Cholesterol is rolling there.
Madness driven by Rabies brings fast and furious terror into body´s mind. Rabies is the fastest unit in the game so it can easily run away from your troops. More effective way is shooting it down but must be done quickly.
Pneumococcus is first supporting enemy in the game. Its power lies in ability to heal nearby enemies. You will probably not see it fighting in face to face battle and it is easy to kill. It shall be done so as soon as possible.
Physicist Alessandro Volta probably did not count that Volt will appear in our game but well, here we are. The Volt is damaging your troops by electric shocks. It is also immune to all your electric damage whenever it is dealt by Tesla towers or shocking power.
Small kidney stone has fatal impact on your Platelets. Even one touch is deadly! Keep the range towers firing on it while you tactically regroup your melee troops to safety.
Unique mutation of Flu virus is rather endemic in pigs or birds but sometimes even human body can be affected. When you think of your build order in the game consider the fact that H1N1 is immune to attack from Range and Artillery towers.
Nicotinic Pro is older, bigger, stronger and more skilled brother of Nicotinic. It is equipped with terrifying axe and due to its amount of hitpoints is not very easy to get rid of it.
Fed Tapeworm belongs to the strongest enemies in the game. Hard shell guarantees more resistance against your attack. Attack damage must be considered as well in case of barracks-heavy strategy.
T.B. typically attacks the lungs but you can meet this enemy in various levels in the game. T.B. or Tuberculosis is quite ordinary enemy unit without any special ability. But still, decent amount of lives and attack damage make it noticeable enemy which cannot be underestimated.
There are more than 100 different known cancers that can affect human body and one of them is here in Defend Your Life! Cancer is final boss with extreme amount of hitpoints and unbelievable deadly damage as well. You know, we are talking about ultimate enemy unit.