Task: Question Generation
Input (English): Background Paragraph: Common foodborne viruses include norovirus and hepatitis A virus. Norovirus, which causes inflammation of the stomach and intestines, has been a recent issue on cruise ships, infecting hundreds of passengers and crew on certain voyages. Hepatitis A causes inflammation of the liver, which is treated with rest and diet changes. Parasites are tiny organisms that live inside another organism. Giardia is a parasite spread through water contaminated with the stools of people or animals who are infected. Food preparers who are infected with parasites can also contaminate food if they do not thoroughly wash their hands after using the bathroom and before handling food. Trichinella is a type of roundworm parasite. People may be infected with this parasite by consuming raw or undercooked pork or wild game. 
Story: Mark and Ken were taking a lunch break. Mark bought some fast-food from a major chain, while Ken ate an egg salad and pork he got from his aunt. Mark got norovirus and hepatitis A virus. Ken got sick because he got infected with Giardia and trichinella.
Output (English): Which person won't be treated with diet changes?