It's winter in the Northern Hemisphere, and that means it's cold and flu season. Though it's an annual occurrence, many people are confused as to exactly which is the cold and which is the flu.

The common cold (and boy is it common) develops gradually over several days and can start with a scratchy throat, sneezing and sniffles leading to congestions. Any fever present is mild (in adults). Coughing is generally hacking and can be moist due to congestion.

On the other hand, influenza often starts rather suddenly with fever (usually greater than 101 degrees F and last 3-4 days), headache and all over body aches (myalgia). Generally one feels exhausted or fatigued. Coughing is usually dry and hacking and can last after all other flu symptoms have passed.

Influenza or "the flu" is more of a systemic illness, meaning it affects your entire body, where as a cold generally just affects the upper body. You can sometimes get a stuffy nose, sneezing and sore throat with the flu, but it