On October 23rd, according to First Financial, the Centers for Disease Control and Prevention in the United States recently issued a food safety alert, stating that the E. coli outbreak in mountainous western states is related to McDonald's quarter pound burgers. The Centers for Disease Control and Prevention in the United States reported that 49 people were infected in 10 states, including 27 in Colorado and 1 elderly person who died. On October 23rd, McDonald's China stated that it does not sell the products mentioned in the news and does not use any related ingredients. McDonald's strictly adheres to legal and regulatory requirements as well as quality management standards.