It’s a sad day for lovers of burritos, but additional cases of E.coli infections have been traced to Chipotle restaurants in New York, California, Minnesota and Ohio. According to a report from Complex, following the temporary closure of 43 locations in Washington and Oregon due to the spread of E.coli from food to customers, new reports of infections linked to the restaurant have surfaced on the opposite side of the country.

The cases are particularly troubling because the symptoms of E.coli infection are not always apparent at the time of ingestion. According to the Centers for Disease Control and Prevention, 43 out of 45 infected people reported eating Chipotle up to a week before they began to notice symptoms. The illnesses reportedly occurred between October 19 and November 8, but the CDC is worried that additional cases may still have yet to be reported.

According to a spokesperson from Chipotle, Chris Arnold, no restaurants are set to be closed in the states with new cases. The company has taken measures to sanitize locations, replace shelved ingredients, and cooperate with federal investigators to provide data about the sources of their ingredients.

Chipotle has over 1,900 locations and offers fresh and high-quality meals at a competitive price. The company has previously come under fire for purchasing pork from a supplier that was found in violation of certain animal treatment standards, which preceded a nationwide shortage of their carnitas offering.

Following the news that the E.coli outbreak had spread to new states, Chipotle’s stock plunged 12 percent to its lowest point this year. Investigators are hoping to find the common factor in the spread of the disease and address the issue as quickly as possible.

The latest update from the CDC regarding the outbreak can be found here.