A bunch of scientists and military types strapped me down and pumped me full of weird stuff. So I changed, became a 'viral' and escaped with my brothers.
I can do the same, but it's not exactly the same. They're a downgraded version, y'know? They don't have any minds of their own, I have to guide them, direct them with my thoughts. But if I feed them my blood after I bite them, I can make a kind of 'familiar'. Someone who can keep their mind, someone who's connected, someone who can do all the things I can't.