Obesity is all around us. We automatically assume someone who is obese does not take care of themselves. The fact is that if you do not mind what you eat, and try to be active then you will gain weight. Food will be stored as fat, and you will have a harder time getting the weight off the longer that happens. There are some studies that suggest that obesity could be caused by a virus. This virus stores more fat in already fatty cells, and it also speeds up the development of new fat cells. This significantly can increase weight gain, and can make it difficult for someone to lose the weight. Accidentally discovered when a pathologist was trying to figure out why chickens were gaining weight and then dying in India, this theory soon became a hot topic in scientific circles. All of them wanting to know the answer to, is obesity caused by the medical fat virus AD36?