https://en.wikipedia.org/wiki/Listeria https://en.wikipedia.org/wiki/Listeria is much more common in unpasteurized milk, but can also contaminate pasteurized mi

https://en.wikipedia.org/wiki/Listeria https://en.wikipedia.org/wiki/Listeria is much more common in unpasteurized milk, but can also contaminate pasteurized milk. Infection in humans has roughly a 20% case fatality rate. Listeriosis is rare, but if every McDonalds were serving spoiled dairy products, a one-in-a-million chance results in several deaths.