Quote Originally Posted by HardKor View Post
The zombies have only ever cleaned up the bodies not the blood. And really how long has it been since the last rain storm? It was pretty early on in the story I think. So the attack on the helicopter could have happened as far as a couple of months back.
Blood is very hard to clean off of concrete. you have to use hydrogen peroxide and other heavy cleaners. Wouldn't just come up with the rain. I don't know this from experience or anything...or do I?