Norovirus is the leading cause of foodborne illness outbreaks in Minnesota. Most people will recover within a few days, but people with weakened immune systems may experience more prolonged symptoms. Use a household bleach solution, up to 1 12 cups of bleach in one gallon of water, to clean surfaces after vomiting or diarrhea accidents. Wear rubber gloves while cleaning, and dispose of paper towels in a plastic bag.