Influenza (known as flu) is a contagious respiratory illness caused by influenza viruses that infect the nose, throat and sometimes the lungs. Symptoms may include fever, cough, sore throat, runny or stuffy nose, muscle or body aches, headaches, fatigue, vomiting and diarrhea. The flu is different from a cold, and usually comes suddenly.
Visit the parents' guide for more information on the flu and what you can do to protect your children from it. "The Flu: A Guide for Parents"
Follow the Children's Mercy Hospital recommendations on "Who Should Get the Flu Vaccine?".