One of the better ones, I liked the idea of comparing "zombie-ism" to rabies.
As for the OP? Why not? Maybe because, you know, full suits of armor are fairly hard to comeby in the 21st century Western World.
Quick, the Zombie Apocalypse has just started and you want a suit of armor, where do you go?! It's Summer so there's no Ren Fairs in town, shopping malls and stores don't keep much in stock when it comes to suits of armor. You MIGHT be able to find one in a museum if you've a good enough museum nearby.
Seriously, where do you get one? I think you'd be better off getting one of those bite-proof suits people train police dogs in.