Yes, that’s why if you don’t have cancer it is dangerous (to the quarters it family members). If you do have cancer, you are going from having cancer to a slightly higher than average risk of a different cancer in the future. It’s worth getting treated.
That’s been my assumption when people talk about stomach pain and diarrhea from Taco Bell, Chipotle, Qdoba, etc. I eat plenty of Mexican food at good and bad places and have never had any issues like that. But I also eat a decent amount of beans normally.