Viruses cause familiar infections such as the common cold, but they also cause severe illnesses. Learn more about viral infections and their symptoms.| medlineplus.gov
There are many types of bacterial infections. Learn about bacterial infections that can make you sick and how to treat them.| medlineplus.gov
This article describes a group of different conditions caused by eating contaminated fish and seafood. The most common of these are ciguatera poisoning, scombroid poisoning, and various shellfish poisonings.| medlineplus.gov
You call it barfing, puking, or throwing up; your doctor calls it vomiting. Read more about nausea and vomiting and the conditions that cause them.| medlineplus.gov
Diarrhea can range from mild to severe and can be dangerous in children. Find out what you can do to treat symptoms and when to call your doctor.| medlineplus.gov