On October 23, 2020 the CDC announced an investigation of an outbreak of Listeria monocytogenes infections linked to deli meats. As of October 22, 2020, a total of 14 people infected with the outbreak strain of Listeria monocytogenes had been reported from three states. Listeria samples were collected from ill people from August 6, 2020 to October 30, 2020. Twelve people were hospitalized. There was one death in Florida.

State and local public health officials interviewed ill people about foods they ate in the month before they became ill. Of the 11 people interviewed, all reported eating Italian-style deli meats such as salami, mortadella, and prosciutto. They reported purchasing prepackaged deli meats and meats sliced at deli counters at various locations.

USDA-FSIS and state officials reviewed records collected from stores where ill people purchased deli meats to find a common supplier of deli meats. They also tested deli meat products that ill people reported eating. However, they did not find a common supplier or a specific type of deli meat as the source of this outbreak.