http://www.echopress.com/event/article/id/72238/Quote:
Peak norovirus season underway in Minnesota
Winter in Minnesota is the peak time of year for norovirus, an illness that should be as easy to prevent as one, two three, say health officials.
February 14 2010
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Noroviruses are the most common cause of food-related illness in Minnesota, and reported outbreaks tend to peak during the winter months. That peak time is currently underway in Minnesota. Outbreaks of norovirus illness have been reported to the Minnesota Department of Health (MDH) in a variety of settings, including commercial food establishments, schools, nursing homes, private homes and hotels.
Symptoms of a norovirus infection can include vomiting, diarrhea, abdominal pain, headache, body aches, and sometimes fever. People typically become ill 24 to 48 hours after exposure to the virus, and symptoms usually last one to two days.
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Quote:
Outbreaks of norovirus illness have been reported to the Minnesota Department of Health (MDH) in a variety of settings, including commercial food establishments, schools, nursing homes, private homes and hotels
How do these "commercial food establishments, schools, nursing homes, private homes and hotels" know that it is norovirus? Not a word about lab-confirmation of any of the reported cases.