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					Originally Posted by  pylon
					 
				 
				Too me the line between a flu and cold is pooping and puking symptoms defining a flu. 
 
But then again what do I know. 
			
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That's more likely a stomach virus (like Norwalk) or food poisoning.
I have read that a true flu will only cause vomiting in small children (which is probably why most of us relate it to the flu because when we were kids, that was a symptom).
A cold will typically only cause congestion in the chest and sinus, a sore throat and coughing, but you can still pretty much go about a normal day without being overly affected.
A flu will knock you out for a few days. Shakes and shivers and an inability to think straight are typical flu symptoms. It may be accompanied by congestion but not always.
I am not a doctor, but I come from a long line of hypochondriacs.