People, this isn't a zombie movie:

Rating: 10/10 (20 October 2019)

Why is everyone upset because the "zombies" moved too quickly? These aren't zombies but a result of some neurobiological substance. If you watched the movie with well enough attention, his colleague Kim calls to tell him it was YS Biotech who did this. Besides that, the infected just infect others, they don't eat as where a normal zombie not only shambles but also eats their victim.