Listeria "bacteria" exists in the following foods, and being infected will result in a thirty percent mortality rate. (Note: It's important to clarify that Listeria is a bacterium, not a virus.)

Listeria is ubiquitous in the environment and can be found in most foods. Listeria has been proven to be a source of infection in meat, eggs, poultry, seafood, dairy products, vegetables, etc. Severe Listeria poisoning can cause blood and brain tissue infections, and many countries have already taken measures to control Listeria in food and established corresponding standards. The bacteria like cold but not heat. If a person is infected, there will be a 30% mortality rate. Currently, there are seven recognized Listeria strains internationally: