From zombie outbreaks to reality-warping plagues, fiction has delivered some truly nightmarish infections that make COVID look like a common cold. This ranking examines the most devastating and creative contagions across gaming, comics, film, and anime—from the necromorph-spawning Marker of Dead Space to Warhammer 40K's reality-corrupting Chaos, the fungal horrors of The Last of Us, and Resident Evil's endless viral experiments.
Whether it's the rage virus turning Britain into a hellscape in 28 Days Later, the Dark Aether's zombie armies in Call of Duty, or the utterly horrifying Crossed virus that breaks humanity in the worst ways imaginable, each infection brings its own flavor of apocalypse. Some create shambling undead, others birth grotesque mutations, and a few literally tear apart the fabric of existence itself.