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Flu or cold? How to tell the difference


Last Update: 11/01/2009 12:49 pm
Nasal flu spray vaccine (Joe Raedle/Getty Images)
Nasal flu spray vaccine (Joe Raedle/Getty Images)
by Chip Mahaney
The E.W. Scripps Company

All of a sudden, you don't feel yourself.  You know you're coming down with something, but you don't know how bad it is, or even what to do first.   Only a doctor's visit and a flu test can confirm whether you've got H1N1, or a seasonal flu, a bacterial infection or a common cold, or something else altogether.  But here are some simple comparisons and contrasts between common symptoms for a cold and the flu:


HOW FAST DID YOUR SYMPTOMS APPEAR?

Cold: Cold symptoms may emerge and worsen over a couple of days.
Flu:  Symptoms typically appear quickly, within 3-6 hours.  Watch for a sudden onset of fever, aches and pains.


DO YOU HAVE A FEVER?

Cold:  Fever is rare with a cold.
Flu:  Fever is very common with the flu.  About 80% of all flu patients experience a fever above 100 degrees for as many as 3-4 days.


ARE YOU COUGHING?

Cold:  A productive cough (one that produces mucus, or a "wet" cough) is often present with a cold.
Flu:  You may not be coughing at all.  But if you are coughing, you're more likely to experience a "dry" cough, or one in which you're not producing any mucus.


ARE YOU ACHY?  DOES YOUR BODY HURT?

Cold:  Colds can come with slight body aches and pains.
Flu:  Severe aches and pains are more common with the flu.


DO YOU HAVE A STUFFY NOSE?

Cold:  Very common with a cold.  It may take a week to work through it, but it should do so on its own.
Flu:  Runny or stuffy noses aren't common with the flu.


DO YOU FEEL TIRED?

Cold: 
You may feel mildly tired with a cold.
Flu: 
You're more likely to feel moderately or severely tired with the flu.


DO YOU HAVE CHILLS?

Cold: 
Chills are uncommon with a cold.
Flu:  60% of flu patients experience chills.


ARE YOU SNEEZING A LOT?

Cold:  Sneezing is quite common with a cold.
Flu:  Sneezing is not a common symptom of the flu.



Again, only a doctor and perhaps a lab test can tell you if you've got the flu or just a cold.  But we hope you feel better now, at least knowing more about what's got you down.

Sources:  flu.gov (Department of Health and Human Services), cdc.gov (Centers for Disease Control), flufacts.com (sponsored by Roche Laboratories).


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