What exactly is cell rot?

Is it just decay due to age? Alien spores from Planet Henkel? A fungus among us?

If it's not simple organic decay due to age, but a cellular "infection" of some kind, does it "migrate"?

My razors are stored close to each other. [Translation: They're pretty much piled next to each other in a corner of a drawer.] Can cell rot in one set of scales "migrate" to another?

Life's been going really well lately, I need something new to worry about.