Cornerstone Premium Foods has recalled its frozen blackberries because they may be contaminated with the Norovirus.

The recall affects 16-ounce bags of Cornerstone Frozen Blackberries with a UPC code of 8 55104 00765 9. The lot number for the affected blackberries is GC 1 1092 9, and the expiry date is April 2021. The distribution dates were 4/2/2019 and 8/7/2019.

Labels of the recalled berries can be viewed here.

The recalled berries have been removed from store shelves at all affected retailers. The contaminated frozen blackberries were sold at retailers in New York, Massachusetts, Pennsylvania, Maine, Florida, Alabama, Wisconsin, Connecticut, and West Virginia.

Consumers that have purchased the contaminated blackberries should destroy them, or return them to the place of purchase for a full refund. Question about the recall can be directed to Cornerstone Premium Foods at 1-800-333-0949, Monday through Friday from 8 a.m. to 5 p.m. ET.

The company became aware of the issue after testing by the U.S. Food and Drug Administration (FDA). The company has not received any reports of illness due to the recalled blackberries. Cornerstone Premium Foods and the FDA are continuing to investigate the source of the Norovirus contamination.

Norovirus is a contagious virus that can cause gastroenteritis symptoms, including nausea, vomiting, and diarrhea. Symptoms can also include low-grade fever, chills, headache, muscle aches, and fatigue. Most symptoms end within 48 hours with elderly adults, young children, and those with weakened immune systems, experiencing more prolonged and severe symptoms.