The CDC now believes the contaminated lettuce is from Yuma, Arizona.
"We can hope that a lot of this lettuce will be out of shelf-life and be off the shelves soon and that a lot of restaurants and grocery stores and people in their homes have heard our advice and, so, we're hoping that the illnesses will start to taper off", Dr. Gieraltowski said.
The CDC says illnesses that occurred after April 5 might not yet be reported due to the time it takes between when a person becomes ill with E. coli and when the illness is reported.
The investigation has not identified a common grower, supplier, distributor, or brand of romaine lettuce.
Last week, the agency broadened its warning, saying consumers should not eat or buy romaine in any form - including whole heads, hearts, chopped, or in salad mixes - unless they can confirm it is not from the Yuma, Ariz. growing region.
Idaho has been hit harder by the outbreak than any other state, with the exception of Pennsylvania, where 12 cases have been confirmed.More news: Eagles Owner: Trump's Presidency 'Disastrous'
"If you do not know if the lettuce in a salad mix is romaine, do not eat it", the CDC warns.
Meijer and Kroger say they're selling romaine lettuce that's safe to eat.
The Centers for Disease Control and Prevention says the outbreak strain is linked to romaine lettuce from Yuma, Arizona.
They went back to the emergency room, where the hospital said Radovich was having kidney failure and sent her by ambulance to a nearby children's hospital in Roseville, California. Wash fruits and vegetables before eating or handling and avoid cross-contamination of food. Eight people have been hospitalized and one developed HUS. Symptoms of this complication include little urine output, easy bruising, lethargy, and pale skin.
Infections have been tied to the E. coli O157:H7 strain and illnesses have often been severe.
Restaurants and retailers should ask their suppliers about the source of their romaine lettuce. In 2016, attorney Fred Pritzker won $7.5 million for young client whose kidneys failed because of hemolytic uremic syndrome after an E. coli infection. "If you or someone from your family recently ate romaine lettuce and are experiencing symptoms, please seek medical treatment immediately". Class action lawsuits may not be appropriate for outbreak victims because the cases are very unique.