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Preventive Medicine Program and Policy Support

CLINICAL PREVENTIVE MEDICINE

Norovirus Illness

Noroviruses, previously referred to as Norwalk-like viruses or small round-structured viruses of the family Caliciviridae, are the predominant cause of gastrointestinal (GI) outbreaks worldwide. Illnesses caused by NoVs are the most costly, pathogen-known, food-related illness in the U.S. in terms of the number of cases occurring and the number of hospitalizations. Noroviruses are also likely to be the single most common cause of disease-outbreak related illnesses aboard ships in the U.S. Navy, and they are an important cause of illnesses in other settings where military populations live and work in crowded conditions.