Chicken pox are small blisters that grown through the skin caused by a varicella-zoster virus. It comes from an Old English word called “gican” which means “to itch”. It is an old childhood disease that shows a freaky amount of water filled rash. A virus in this disease is the same as that causes herpes zoster or shingles in adults. When the body is infected by this virus, it automatically produces antibodies causing immunity from being infected by the same virus again.