here's the thing too though... even if it doesn't kill you there are many food borne illnesses that don't show their effects until many days later some even over a month later so the pizza borne illness wouldn't be tracked back to that. it's almost impossible to track those back to their sources unless you have an outbreak of it. now a quick acting food borne illness would have a more quick cause and effect that would aid in diagnosis.

https://www.fda.gov/food/consumers/what-you-need-know-about-...