Gastroenteritis
Most Wanted Virus
http://www.in.gov/isdh/22681.htm
Gastroenteritis, scientifically known as the Norwalk Virus, is like a stomach flu. The symptoms are loss of appetite, nausea and vomiting, diarrhea, abdominal cramps, and fever.
Microscopic picture of this virus
A 3D picture of this virus
Another microscopic picture
Gastroenteritis enters an organism when inhaling or having any close contact with someone that had, had this virus already or eating or drinking something that was contaminated. Anyone can get it but if your an elderly or very young it will be really bad and can take a while to cure. The way to cure it is to take medicine and watch what you're eating. Looking out what you're eating is also a way to prevent it.