Except a fever doesn’t come from a bad burrito.
If you picked up salmonella it sure does.
Viruses come in lots of different sizes, colors, and packages. Many of them will bring on a fever, diarrhea, and vomiting.
It respect this guy for self reporting and for the actions taken to verify he was OK.
I used the term “bad burrito” the way some in New England say a bad clam, or bad ice cube.