Throw out all your romaine lettuce. Those people who hate salads have been on to something. To be safe, you should probably just throw out all your lettuce if you don’t know what kind it is, according to the CDC. To date there have been 53 cases of E. coli infections across 16 states linked to romaine lettuce. Thirty one people have been hospitalized “including five people who have developed a type of kidney failure called hemolytic uremic syndrome.” The CDC has narrowed the location of the bad lettuce but warns that “unless you can confirm it is not from the Yuma, Arizona, growing region,” it’s not safe to eat.

Symptoms of E. coli may include severe stomach cramps, diarrhea, and vomiting and usually appear 1-10 days after exposure. People with weakened immune symptoms, young children, older adults, and pregnant women are most at risk for serious complications.