I had the flu once, way back in the early 90s, and it was the sickest I have ever been in my life! Whole body achy, fever, then chills, queasy/vomiting AND diarrhea. I spent a week in bed, on the couch, or in the bathroom, and lost 10 lbs because I could not eat anything.

I guess I have been pretty lucky since then, because I started annual getting flu shots just a few years ago.