U.S. Food and Drug Administration
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Flu Information

General Information

The flu is an infection of the respiratory tract caused by the influenza virus. Symptoms may include some or all of the following:

  • sudden onset of headache, chills, and feeling generally miserable
  • respiratory symptoms like nasal congestion, cough and sore throat
  • extreme fatigue and muscle aches in the back and legs
  • fever between 100 and 103 degrees Fahrenheit in adults (sometimes higher in children).

Fraudulent Flu Products

Flu Fact Sheet

Flu Information from the Dept. of Health and Human Services

Flu Activity (CDC)

Prevention and Treatment

Vaccines

Antiviral Drugs

Diagnostics

Pandemic and Avian Flu

For Health Professionals

Other Flu Information

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Flu Information Archive


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