The Food and Drug Administration warned Thursday of a dangerous Whole Foods mix up after the popular grocery store accidentally switched the labels of its real chicken salad and its vegan “chick’n” salad. The concern is that people with an allergy to soy or eggs could have serious or life-threatening allergic reactions, as the vegan chick’n salad has soy and the real chicken salad has egg. Normally, the allergens are declared when the products are labeled correctly.

The mislabeled salads were reportedly sold in 15 stores in the Northeast, including stores in Connecticut, Maine, Massachusetts, New Jersey and New York. Whole Foods said that some of the salads were sold in bulk at the cold food bar, while other salads were sold in the prepared food section.

Libba Letton, a spokeswoman for Whole Foods, told The Associated Press that the salads were switched at a company-owned  commissary that provides food for Whole Foods. A Whole Foods workers discovered the mistake. The store took action Friday by posting signs in stores warning customers about the mix up.

Whole Foods said that any of the mislabeled salads can be returned for a full refund.

The FDA says that more than 160 foods can caused allergic reactions in people with food allergies. Eggs and soybeans are two of the eight most common allergenic foods. Anaphylaxis to food leads to 150 deaths annually and thousands of hospital visits.

Did you buy one of these mislabeled salads? Do you have a severe food allergy? If so, how do you stay safe? Sound off in the comments section.