Berries, especially frozen ones like strawberries, raspberries, and blueberries, have been linked to norovirus outbreaks in the past. The virus can contaminate berries through infected food handlers, contaminated water used for irrigation or washing, or improper handling during processing. Since norovirus is highly contagious and can survive freezing, contaminated berries can pose a risk if consumed without proper washing or cooking.

To reduce the risk of norovirus contamination from berries:

  • Wash fresh berries thoroughly under running water before eating.
  • Consider cooking frozen berries if you’re concerned about contamination, as heat can kill the virus.
  • Purchase from reputable sources that follow strict hygiene and food safety regulations.
  • Practice good hygiene by washing hands before handling food.

Tips for safe handling of berries include:

  • Rinse berries under cold running water for at least 30 seconds before eating, gently rubbing the berries with your hands to remove surface contaminants.
  • Using a clean colander can help ensure all sides of the berries are washed, but avoid using soap or commercial produce washes, as they may leave residues.
  • Cook frozen berries when possible as norovirus can survive freezing. Frozen berries should be cooked at 85°C (185°F) for at least 1-2 minutes to kill the virus. If using frozen berries in smoothies, consider briefly heating them before blending.
  • Wash hands with soap and water for at least 20 seconds before handling berries.
  • Clean cutting boards, knives, and countertops before and after food preparation.
  • Choose brands that follow strict hygiene and safety standards for harvesting and packaging.
  • Check recall alerts for recent contamination reports on frozen or fresh berries at FDA.gov.
  • Keep fresh berries refrigerated at or below 40°F (4°C).
  • Store frozen berries at 0°F (-18°C) or lower and avoid refreezing thawed berries.