For the downvoters, the #1 cause for food bourne illness is people not washing their hands before they eat.

Usually if a restaurant is to blamed, there are multiple cases of illness outbreaks.

I didn't downvote but I guess your question was a bit condescending since the narrator is likely not some helpless 10-year old still learning personal hygiene.

Over 20 years my dad investigated claims of restaurant food poisoning, and there was a never an outbreak due to negligence; it was always deemed isolated incident attributed to not washing hands.