Do inspection grades actually predict food poisoning?
What inspection results can and can't tell you about your odds of getting sick — an honest look.
The honest answer: inspection results measure risk conditions, not outcomes — and that's still worth a lot.
An inspection verifies the practices known to prevent foodborne illness: temperature control, hand hygiene, sanitized equipment, safe sourcing. Public-health research consistently ties those risk factors to outbreaks — they are the CDC's canonical contributing factors. A kitchen that fails on them repeatedly has more chances to make someone sick than one that doesn't. In that sense, grades are meaningful.
The limits, plainly
An inspection is a periodic snapshot of a changing operation, food poisoning is dramatically underreported (most people never connect a bad night to its cause, let alone report it), and a single visit can catch a good kitchen on a bad day or miss a bad kitchen on a good one. No grade is a guarantee in either direction.
The most useful reading is longitudinal: a consistent record of clean inspections across years is strong evidence of a disciplined operation. A single grade — good or bad — is weak evidence of anything. That's why CleanPlate always shows the history, not just the latest letter.
If you think a restaurant made you sick
Report it to the local health department — every agency CleanPlate lists has a complaint channel on its official site, linked from our Data Sources page. Complaint reports are taken seriously and trigger targeted inspections; they are one of the main ways problem kitchens surface between routine visits. And see a medical professional if symptoms are severe or persistent — especially for young children, elderly people, pregnant people, or anyone immunocompromised.