While I am more than happy for ZAAL and his little mad-scientist/zombie army recruiting friend, I'd have to say no, it's impossible for the "T-Virus", or anything similar, to exist. And even if it did, no superhuman powers = easy kill. You wouldn't have to lop off the head, due to the fact that the person infected would still be alive.
I say bring the virus on. Gives me a valid reason to kill. Telling people I'm just "insane" isn't working anymore.