Listeria is a disease passed through raw milk, refrigerated smoked seafood, ready-to-eat meats, refrigerated meat spreads, raw sprouts, and soft cheeses made with unpasteurized milk.

Pregnant woman are most at risk, but older adults, people who are on medication so their body doesn't reject a recently transplanted organ, people with weak immune systems, and people with certain diseases.

The incubation period is anywhere from 3 to 70 days.

The symptoms include fever, a stiff neck, confusion, weakness, and vomiting. It is usually preceded by diarrhea.

The illness is not fatal to adults, but can cause miscarriage, stillbirth, and life-long health problems in fetuses.

Listeria can be prevented by avoiding raw milk, washing kitchen utensils and produce, and not refrigerating ready-to-eat or perishable foods.

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