A nationwide public health alert has been issued following concerns that ready-to-eat pasta meals, particularly meatball dishes sold at Walmart, may be contaminated with listeria. The USDA warns that these meals could be linked to a deadly listeria outbreak. Consumers are urged to check their freezers and dispose of any affected products. Multiple recalls have been initiated, affecting pasta and meatball items at various retailers, including Kroger. Health officials stress the importance of food safety, advising individuals to stay informed about potential risks associated with these popular meal options.