Same happened to my wife, youngest son and myself at Wendy's in 1978, haven't stepped foot in one since. A night in the hospital with I.V.s for the three of us was enough to last a life time.
My oldest son, 5 years old at the time usually ate like a little pig, except for that one time and he didn't want anything to eat and was the only one who didn't get sick.
I've accused him ever since of being "in on it". Since I am accusing a member of this forum of being a part of a conspiracy, I have pinged him to this reply.
I almost died once - spent three days in the hospital in NJ - after eating tainted roast beef at a Roy Roger’s - it’s not just street food. While I don’t disagree with having health inspectors, I do disagree with this kind of blanket ban.