biological warfare

• Human society has been decimated by a holocaust caused by biological warfare research gone wrong : instead of creating super - soldiers , a genetically - engineered virus turns infected humans into hemophages , a vampire - like sub - species with enhanced physical abilities
  在21世纪末期，出现一种变种人类，他们因为感染了“变种血友病源”导致基因突变，速度体能和智商都比常人强过好几百倍。