<P> In 2008, Chipotle was implicated in a norovirus outbreak in Kent, Ohio, where over 400 people became ill after eating at a Chipotle restaurant . Officials at the Ohio Department of Health said that the outbreak was caused by Norovirus Genotype G2 . Many of the victims were students at Kent State University . The initial source of the outbreak was never found . </P> <P> In 2009, an investigation by the Minnesota Department of Health traced an outbreak of campylobacteriosis to a Chipotle Mexican Grill in Apple Valley, Minnesota . The investigation found that chicken was sometimes served undercooked by the restaurant and determined that lettuce which had been cross-contaminated with raw or undercooked chicken was the vector for the outbreak . </P> <P> In early November 2015, The Oregonian reported that there was a little - known E. coli outbreak that had occurred earlier in July in which five people were infected with the O157: H7 strain of E. coli . The outbreak was traced to a single Chipotle location in Seattle and that the incident was not publicized at that time . Seattle public health officials defended their actions at that time by saying that the outbreak was over by the time they made an association with Chipotle . Health officials were unable to trace the source of the July outbreak and said that the cause of the July outbreak is unrelated to the October / November outbreak . </P> <P> Another norovirus outbreak was confirmed to have occurred in August 2015 at a Simi Valley, California location in which 80 customers and 18 employees reported becoming ill . Ventura County health inspectors found various health violations during two inspections following the outbreak report . Despite those violations, the county health officials did not close the restaurant and allowed it to continue to operate . In a January 2016 article, the New York Times reported that the number of victims involved in the Simi Valley norovirus outbreak was actually 207, twice the number that was reported earlier . </P>

When did the chipotle e coli outbreak start
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