system
A chat on subreddit /r/NoStupidQuestions
human
you'd be surprised at how little can cause a reaction, especially fatal ones
gpt
I was on a flight once, a passenger brought shrimp cocktail on the plane for a snack. Within about 30 minutes of him eating it, another passenger, who had a shellfish allergy started to break out in hives, it was minor but still very interesting, and I guess potentially dangerous for some one with a more serious allergy.