The Walking Dead: Days Remaining

[Zombie theme + protagonist is decisive in killing + no harem, no super powers + apocalypse] An unprecedented meteorite rain caused a global flu. On the day when the zombie crisis broke out, more than two-thirds of the infected people mutated into corpses. Four days later, the zombies mutated. Seven days later, 90% of the world's population was infected... When zombies siege the city, how do humans respond? (Note: The plot and characters in this article are all fictitious, please do not substitute them into reality)