Do not eat romaine lettuce. That’s the message from state and federal health officials. A new outbreak of illnesses was caused by a dangerous strain of E. coli found on the lettuce.

Kirk Smith with the Minnesota Department of health said, “From the time you eat it to you become sick is usually in the three-to-four-day range for E. coli 0157, but it can range anywhere from one up to 8 or 10 days.”

He added that so far, no cases of illness have been reported in Minnesota.

Those that have romaine in the refrigerator, Smith said, should throw it away and clean the area thoroughly to prevent, “Cross contamination from contaminated product to other products that won’t be cooked before they’re eaten.”

The origin of the outbreak is still unknown. Over 30 people in eleven states have gotten sick so far from contaminated lettuce.