According to federal authorities, a salmonella outbreak has sickened nine people in four states, with three of them hospitalized. More than two dozen shrimp products sold nationwide are now being recalled.

The FDA expanded an ongoing recall of frozen shrimp products from Avanti Frozen Foods over the weekend. Affected products include “various sizes of frozen cooked, peeled, deveined, shrimp (with some packaged with cocktail sauce) sold in various unit sizes,” which were distributed nationwide from November 2020 to May 2021 but may have been sold in stores more recently, USA Today reported.

The recalled shrimp was distributed across the United States under a variety of labels, including 365, Ahold, Big River, Censea, Chicken of the Sea, CWNO, First Street, Food Lion, Hannaford, Harbor Banks, Honest Catch, HOS, Meijer, Nature’s Promise, Open Acres, Sandbar, Sea Cove, Waterfront Bistro, Wellsley Farms, and WFNO Brands, according to CDC.

The recall, which began on August 13, is an expansion of one that began in late June, and the company said it “has been initiated out of an abundance of precaution and will cover a large amount of product that has not been associated with any illness.”

Six people had become ill as a result of the company’s shrimp at the time. According to the CDC, nine people have contracted salmonella in four states: Nevada, Arizona, Michigan, and Rhode Island. There have been no deaths, but three people have been hospitalized.

Salmonella can cause diarrhea, vomiting, and a fever. The majority of people recover from salmonella without treatment within a week, but the CDC warns that young children, the elderly, and those with weakened immune systems may experience a more acute illness that requires hospitalization.

Avanti said it has “taken several preventive steps and initiatives to eliminate potential for future contaminations.”

Consumers should check their freezers for the shrimp and discard or return any recalled products found here.