In October 2020 the CDC, public health and regulatory officials in several states and the US FDA announced an investigation an outbreak of E. coli O157:H7. A total of 32 outbreak associated cases were reported from 12 states. Illnesses started on dates ranging from June 6, 2020 to October 25, 2020. Fifteen people were hospitalized including one person who developed hemolytic uremic syndrome. One death was reported from Michigan.

State and local public health officials interviewed ill people to determine what they ate and other exposures in the week before they got sick. Ill people reported eating a variety of food items. Several ill people also reported eating at the same restaurant and had eaten multiple common food items. CDC analyzed the interview data and did not identify a specific food item as a potential source of the outbreak. FDA conducted traceback investigations for several of the food items served at the restaurant and did not find a common source in the distribution chain.

As of December 18, 2020, this outbreak is over. This outbreak ended before enough information was available for investigators to identify the likely source.