The A-Virus is a deadly pathogen in this world, and widely recognized as the Apocalypse Virus.
It came from an asteroid that struck the northern continent.
From that point, human civilization began to collapse, plunging the world into doomsday.
The origin of the A-Virus remains a mysterious, unsolved case.
Over the years of the apocalypse, the virus has continued to evolve in its infected creatures.
This has made it increasingly difficult for survivors to fight them.
Despite countless efforts, the surviving humans have been unable to find the cure they desperately need.
Day by day, the number of survivors, both male and female, continued to decline rapidly.
If this continues, human extinction in this world is inevitable.
Aria remembered that once a human is infected, they do not turn into a zombie or mutant monster immediately, but not everyone knows this.
Many believe that once someone is infected, they are beyond saving.
