Power Doesn´t Make You Immortal -One Shot-

In a post-apocaliptic future, there´s monsters roaming Earth, capable of turning their own bodies into massive explosions and regain form. Druls.
Thanks to a unknown patogen called DL cell, which half of the population produces in 2154. 
Those who are within safe limits are called Semis, those who go further than 60% are executed. No exceptions. 

So, when a young semi, med student discovers he has gone over 60% he will have to decide which side to take.