What is one of the key symptoms of Norwalk virus infection?

Norwalk virus, a highly contagious agent commonly associated with outbreaks of gastroenteritis, typically presents with key symptoms that primarily affect the gastrointestinal tract. One of the hallmark symptoms of Norwalk virus infection is severe gastrointestinal illness, which can include symptoms such as intense abdominal cramps, diarrhea, nausea, and vomiting. This virus spreads through the fecal-oral route, often via contaminated food or water, and can result in rapid onset of these symptoms, typically within 12 to 48 hours after exposure.

In contrast, the other symptoms listed are not associated with Norwalk virus infection. Rashes on the skin, intense fever and chills, and persistent coughing are more indicative of other illnesses or infections rather than the gastrointestinal focus of a Norwalk virus infection. Understanding these unique symptoms is crucial for accurately identifying and managing outbreaks of this virus.