The FDA classifies this recall as Class II, which the agency describes as a situation "in which use of or exposure to a violative product may cause temporary or medically reversible adverse health consequences or where the probability of serious adverse health consequences is remote."

Some packages of Great Value frozen shrimp sold at Walmart are at risk for potential for Cesium-137 contamination, the FDA says.

Certain raw frozen shrimp products sold in Walmart under the Great Value brand have been recalled after Cesium-137, or Cs-137, was detected in shipping containers at four U.S. ports, according to the Food and Drug Administration.