A recall warning has been upgraded to the highest level by the FDA. This decision was made due to concerns about potential health risks. The recall involves certain frozen berry products sold at Publix supermarkets.

The products in question are frozen blueberries and mixed berries. They were sold in eight Southern states.

Further details about the recall, including the specific products affected, are available from the source. The FDA's warning indicates a serious risk to health, but full information can be found through the original announcement.