Outbreak Alert: Do not eat any romaine lettuce, including whole heads and hearts, chopped, organic and salad mixes with romaine until we learn more. If you don’t know if it’s romaine or can’t confirm the source, don’t eat it. https://t.co/gBp5RXnfvu pic.twitter.com/lsZrhQDzjI— USDA Food Safety (@USDAFoodSafety) November 20, 2018