The recalled products may not fully seal shut and may be contaminated with one of "the most lethal substances known," according to WHO.

Tri-Union Seafoods canned tuna sold at Costco, Trader Joe’s, Walmart, and other stores have been recalled for botulism risk. Brands include Genova and H-E-B.

With 90% of the U.S. population living within 10 miles of a Walmart store, recalls of products they sell can have widespread effects. Labeling mistakes, safety concerns and contamination can all cause food recalls. Prescriptions and other products can also be recalled.