Listeria can’t survive cooking so just fully cook any food you get that’s RTE (Ready To Eat). Examples of high risk food included frozen pizza and corn dogs since there’s both meat and bread coming together, each having its own food bourne illness risks. So yeah, fully cook your food.

The good news however is that the FDA takes Listeria very seriously and will stop production at a plant until a battery of thousands of swabs all come back negative. Plants don’t want to be shut down by the FDA so they do their own swabbing very frequently and often have private contractors who also swab very frequently so that they can identify contaminations before they get to the FDA

More good news is Listeria really struggles to compete with other food bourne illnesses, so in a facility that’s really poorly cleaned and maintained, it’ll most likely be a far less deadly pathogen because they beat out Listeria in the competition for resources to grow and spread