Outbreak of Norovirus Gastroenteritis Associated with Ice Cream Contaminated by Frozen Raspberries from China; Minnesota, USA, 2016.

To our knowledge, this is the first norovirus outbreak due to commercially distributed frozen berries identified in the United States. To detect norovirus outbreaks associated with commercially distributed food vehicles, investigators should thoroughly investigate all norovirus outbreaks (including stool testing and genotyping), coordinate complaint and response activities across agencies and jurisdictions, and consider testing food for norovirus when appropriate.