Ok .... so my boyfriend's dad had diarrhea on Friday, but that was the only symptom he had. He later said it was some beans, probably undercooked, that he had ate. He wasn't vomiting or anything like that. His oldest daughter also had diarrhea yesterday, but I'm not sure if she ate the beans. My boyfriend ate them but he is fine. Do you think it is norovirus, and how long should I wait before going over there?