I binged watched all 4 season despite being ill and had temperature. this helped me a lot.
It gave some hybrid korean zombie series vibes where zombies run and are much more dangerous but here its kinda more realistic, in the point of view of infection.

Of course tragic things can be character deaths where there are worse kill-off scenes of some characters who we met since first episode.
Characters are all amazing and the cast. it gives you the worrying aspect and actors did great job. same with plot!
music is also unique and gives METRO game vibes.