More than 21-thousand pounds of frozen pizzas that were sold at Walmart are being recalled.  RBR Meat Company's "Marketside supreme frozen pizza" are being deemed a health hazard because of possible Listeria contamination.  The USDA's Food Safety and Inspection Service said Wednesday that the product tested positive for the bacteria during a random sampling.  Customers are advised to throw away the pizzas or return them.  

Listeria can cause deadly infections in young children and elders.  Symptoms include fever, muscle aches and diarrhea.