Influenza, also called the flu, is a virus that causes a severe respiratory infection and spreads around the world in epidemics. It starts out like a cold, but soon gets much worse.

Symptoms include high fever, aches and pains, cough, sweating and shivering, and, often, vomiting and/or diarrhea. The worst is usually over in three to five days, but it may take two or three weeks to feel completely well.

All sites submitted to this category must be designed for use by kids / teens and provide information on or about influenza or flu.

Websites designed for parents or teachers, or to sell products or services, will not be accepted.

English-only sites. Sites in other languages should be submitted to the appropriate category in /International.