1992–1993 Jack in the Box E. coli outbreak - Wikipedia
Notes from the Field: Multistate Outbreak of Escherichia coli O157
Wendy's is likely source of multistate E. coli outbreak, CDC says
E. coli O157:H7 associated with lettuce in the Maritimes and
Multi-State E. Coli Outbreak Spreads To New York, Kentucky: CDC
Fast Food E. coli Outbreaks - Chipotle, Jimmy John's, Evergreens
Wendy's E. Coli Outbreak: Fast Food Chain Pulls Lettuce in Mideast
Wendy's food illness outbreak is now up to 6 states, CDC says
Advice to Food Industries & Consumers
Inside Chipotle's Efforts to Woo Burrito Lovers Again
With E. coli Outbreaks in Canada, Arkansas and Illinois what do