My whole family had it, and I’m just getting over it. I had a flu shot a month ago; don’t know if that’s pertinent or not.
Starts off with achiness and fatigue. It caused all of us to puke our guts out on the first day; the baby was barfing for days.
It gave me the shits for about 5 days, too. Just about the worst diarrhea I’ve ever had except for campilobacter poisoning.