With a cold you can fuction. With the flu you have temps. and chills and very weak. I had the flu two years ago and didn't have any cold symptoms, I ran a temp and got the chills so bad it made my body sore from shaking so hard...went to doctor they told me I had the Flu....I thought it was strange because I wasnt coughing or had a sore throat or anything just temp and chills.

Weird!