10 Signs of the Flu
Reviewed: Dr. Gromatzky
Flu Sign #8: Fever
Another tell-tale sign that you have the flu rather than a cold is that you get a fever. A fever can sometimes develop with a cold, and the flu does not always cause a fever, but the chances are that a fever does mean you have the flu. A fever associated with the flu is typically over 100.4 F (38 C).
The reason for the fever is that when the influenza virus is detected, the body tries to make the body too hot for the virus to survive. The body will identify different types of pathogens and raise the body temperature according to what the pathogen struggles with.
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