The U.S. Food and Drug Administration along with White Castle have announced a recall of a select group of White Castle frozen sandwich products due to listeria concerns.
This voluntary recall includes six-pack cheeseburgers, hamburgers, jalapeño cheeseburgers, and 16-pack hamburgers and cheeseburgers with expiration dates between August 4 and August 17.

And for those customers who did purchase the now-recalled White Castle sandwiches should absolutely dispose of the products or return them to the store they were purchased at for a full refund.
If you believe you have consumed the affected products, please consult a medical professional.