Another one gone

This story is about a terribale disease called senceasitise ( sen-ce-sit-is) that wipes out most of the world. The senceasitise makes people want to kill them self but keep coming back alive as zombies so it is just an on going pain (it is also contagiouse, and only way to get ride of the person with the senceasitise is to shoot them). Sarah's dad gets it and the only way to get rid of him is to put him in a meduimish sized pen and shoot him in there to keep it contained. After awhile they starts to realize more and more people they know start to get senceasitise, and they slowly run out of ammo but going to town is filled with people with senceasitise. And is Sarah and her bestfriend go to town, both of them won't make it out alive. So someone has sacrafice them self to try and get the ammo.