I had a chicken sandwich and fries about an hour before my flight on 1/21 around 1:30PM and within an hour felt extremely sick and nauseous. I had sever vomiting and diarrhea for about 18 hours straight after eating this food. Having food poisoning on an airplane is an actual nightmare. I was unable to keep liquids down and became severely dehydrated. I don't have any allergies and have never experienced these symptoms after eating. It was the only meal I ate that day.