The CDC said the number of infected "is likely much higher than the number reported, and the outbreak may not be limited to the states with known illnesses."
Fresh Express recalled all of its branded and private label salad products made at its Streamwood, Illinois, facility and containing iceberg lettuce, red cabbage or carrots.
Four people have been hospitalized and one person has died as a result of a listeria outbreak traced to Almark Foods in Gainesville, Georgia.
The recall affects more than 40 pork products produced by Morris Meat Packing between November 25, 2017 to November 9, 2019, that was sent to distributors and retailers in Illinois.
Almost 100,000 pounds' worth of salad products have had to be recalled after samples of lettuce tested positive for the potentially deadly E. Coli strain 0157:H7.
This isn't the first time Chipotle has dealt with food safety issues.
Public health officials are cracking down on produce farmers and foreign food importers.