Their not weapons per say, its like a person whos smoked alot and been bitten by a zombie becomes a Smoker. Its like in the book people who worked out a lot become known as 'gym bunnies' because they run round in sweatpants etc and can run instead of shuffle.<br/><br/>I kind of imagine that the infection wouldn't just turn people into shuffling bumbling zombies, I mean all virus's etc evolve into other things it's like the flu and thats why nobody can find a cure for it because it keeps evolving.