An E. coli outbreak possible linked to Wendy’s romaine lettuce has spread across the Midwest and discovered in at least 6 states, according to the Centers for Disease Control and Prevention.

Many people who were infected with the bacteria reportedly consumed meals that included romaine lettuce at the popular chain Wendy’s, with locations spanning from Michigan, Ohio, Indiana, and Pennsylvania.

New illnesses were documented in Kentucky and New York, prompting Wendy’s to release a statement on the outbreak:

“Wendy’s has taken the precautionary measure of removing the romaine lettuce being used in sandwiches from restaurants in that region,” the fast food chain said. “The lettuce that we use in our salads is different, and is not affected by this action. As a company, we are committed to upholding our high standards of food safety and quality.”

There have been 97 illnesses, 43 hospitalizations and no deaths, according to the CDC.