1995 E. coli O157:H7 outbreak at Jack in the Box was when E. coli O157:H7 in undercooked hamburgers that infected about 400 people and killed four people who had eaten at Jack in the Box in Washington State or come in contact with the infected.[1]
References
^"Case Study: Jack in the Box E. coli crisis". United States Department of Defense. http://www.ou.edu/deptcomm/dodjcc/groups/02C2/Jack%20in%20the%20Box.htm. Retrieved 2011-10-08. "One child had eaten at Jack in the Box, it was thought another was infected by a child who became ill after eating at Jack in the Box, and a cause for the third child's infection was unknown. In total, 400 people were infected with the bacteria in Washington State, Idaho and Nevada. "As a result of this crisis, the Jack in the Box fast-food chain was not only in danger of losing sales, the company's very existence was threatened by the crisis as well"."