Ways to prevent a stomach infection include:
Wash your hands thoroughly while handling or preparing food.
Don’t leave food out too long when you’re serving it. Throw it out if there’s any chance it has gone bad.
If you learn of an outbreak of tainted food or drink through a news report, don’t have those items.
Limit contact with others who have symptoms such as vomiting or diarrhoea.
Don’t eat undercooked food.
Use alcohol-based hand sanitisers.