In the 2015 (most recent data) Annual Report from the CDC, published August 2017, there were 902 food borne illness outbreaks in the USA with Norovirus being the most confirmed, single cause. Sixty (60%) percent were traced to restaurants. Sit-down dining establishments accounted for nearly half of the restaurant sources.
We live in a society that expects a certain level of service. Our trash and sewers are controlled. We expect our water to be clean and we all know not to litter. Many people recycle and compost trash. When we walk into a restaurant, however, are consumers really concerned about restaurant cleanliness?