Throw out any romaine lettuce you have now unless you know where it came from, the Centers for Disease Control and Prevention said late Friday. The agency said it was expanding its warning about romaine lettuce contaminated with E. coli to cover all lettuce that was grown around Yuma, Ariz. "Do not buy or eat romaine lettuce at a grocery store or restaurant unless you can confirm it is not from the Yuma, Arizona, growing region," the CDC said, adding, "Unless the source of the product is known, consumers anywhere in the United States who have any store-bought romaine lettuce at home should not eat it and should throw it away, even if some of it was eaten and no one has gotten sick." According to the agency, 53 people across 16 states have been infected with the E. coli strain O157:H7 connected with romaine lettuce, and 31 have been hospitalized with five of those experiencing kidney failure. No deaths have been reported, the CDC said. The CDC originally issued warnings about the romaine lettuce E. coli outbreak last week.