What is the definition of fever for the purposes of diagnosing the flu?

CDC defines fever as a temperature of 100 degrees Fahrenheit or 37.8 degrees Celsius or greater without the use of fever-reducing medications.

Last Reviewed: 10/15/2010

• What can I take if I have a fever with the flu or flu like symptoms?
• What household cleaning should be done to prevent the spread of flu viruses?
• What is the best way to keep from spreading the virus through coughing or sneezing?

• Taking Care of the Sick