WARNING: An E. coli outbreak linked to romaine lettuce has spread to at least 16 states and sickened at least 60 people, including eight inmates at an Alaska prison. The Centers for Disease Control and Prevention expanded their warning on Friday to include any type of romaine lettuce, including whole heads and hearts of romaine. So if you have ANY store-bought romaine at home, including salads and salad mixes containing romaine lettuce, throw it away immediately.