Inspiration come from fascination with frequency and the states of matter (liquid, solid, gas, plasma etc..) Ancient world myths and mysticism which frequently use frequency as a supernatural tool.
Media inspirations came from
videogames Action, Horror, Fighting & RPGS (Dead Space, Resident Evil, Final Fantasy, Street Fighter, Tekken, MGS, DMC, MK2&3, Shadow Of Colossus, to name a few)
horror movies and dark comedies (The Thing, Shaun of the dead, The Ring, Evil Dead, Afflicted... to name a few)
The series was inspired by having a flu years ago and pondering: "What if instead of headaches/fever/runny nose, you get cool superpowers?" In RL, you keep distance from people to not spread your flu but: "What if anyone you accidentally infect instantly transformed into zombie-like monsters? You watch with a mix of guilt and horror, but if you don't act quickly you're 1st on their menu!"
That became the core mechanic of the comic.
Previously it started as an idea for a videogame , but comics became easier to handle: