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

Tuna sold in 26 states and in Washington, D.C., was recalled over concerns that it may have been contaminated. The stores affected include Trader Joe’s, Genova, Van Camp’s and H-E-B.

A canned tuna recall at Costco and other stores over a botulism risk has consumers on alert. Check if your tuna is affected and what to do next.