There is much you can’t control but if you are diligent about the things you can you WILL reduce your risks.
Wash your hands before eating. When leaving the restroom be careful not to re-contaminate them.
Look for contaminated tableware or glasses and ask for replacements.
Don’t drink using uncovered straws or consume drinks with cut fruit.
Don’t place the eating part of your tableware on the table. Leave it on a napkin or a plate.
If you witness someone preparing or serving your food that is obviously ill, has open sores or is not using good hygiene demand new food, a new server or refuse to eat there.
If your food is served and looks or tastes spoiled, is not the right temperature or is contaminated return it and ask for a new serving.
Ground red meats and poultry must be thoroughly cooked with no red.