Frozen pizzas sold at Walmart and Aldi are under recall due to potential salmonella contamination, as announced by the U.S. Department of Agriculture's Food Safety and Inspection Services on April 30. The recall affects several products, including Great Value Thin Crust Chicken Bacon Ranch pizza and Mama Cozzi's Biscuit Crust Sausage & Cheese Breakfast Pizza. Customers are advised not to consume these items, even if cooked thoroughly, due to the risk of food-borne illness. Fortunately, no confirmed cases of illness have been reported linked to these products. Salmonella is a leading cause of food-borne illness in the United States, with the Centers for Disease Control and Prevention estimating about 1.35 million infections annually. Symptoms of salmonella infection include nausea, vomiting, and abdominal cramps.