"First, you cannot possibly contain a Class 4 outbreak by yourself unless every single Z goes into 1 place and they are killed there. Trying to kill every Z outside your house will probably double or even triple the amount that was there before. Using cotton swabs or ear plugs will not allow you to hear when they break a window or push down a door. Drowning out the noise with louder noise will attract more. The best thing to do is try to get through it. It WILL drive you insane. It WILL make you want to kill every single motherf***er out there or in there with you. "