Cases of norovirus, also known as the "winter vomiting disease," have been surging ahead of schedule this year, according to data from the U.S. Centers for Disease Control and Prevention (CDC).

Typically, norovirus cases spike following the Christmas and New Year period; however, this year, cases at the end of November notably increased, CDC data showed.

Why It Matters

Norovirus is highly contagious, and in severe cases, hospitalization may be required to treat severe dehydration from excessive vomiting and diarrhea. The virus is responsible for nearly 60 percent of foodborne illnesses in the U.S. and is the leading cause of vomiting and diarrhea from acute gastroenteritis.

Each year, there are 900 deaths due to the virus, mostly among those over the age of 65, and 109,000 hospital

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