The Spread of Excession by Mark MJ Green paperback

I took things too far.
 
There is an infection spreading across the world. A virus with no
discernible pathogen and only one inevitable conclusion.
Unlike other diseases, it isn’t the host who dies but those around them, as the afflicted become gripped by a need to act out their most violent fantasies.
 
The media have called it Excession.
 
I was there when it began.
 
I don’t know if I will still be here at the end, for I may now be one of the infected.
  
And I do not care.