You have to think of a virus as a flash drive. It can just sit there with nothing happening for years and years. If it happens to coincidentally get plugged int

You have to think of a virus as a flash drive. It can just sit there with nothing happening for years and years. If it happens to coincidentally get plugged into a PC it immediately starts executing a program that hijacks the entire computer to start producing more copies of that same flash drive. In this analogy the computer is your cell.