Cases of norovirus are spiking in the U.S. along with other illnesses in what some are calling a "quad-demic" of viruses.

Often referred to as the stomach flu, noroviruses aren't actually part of the same class of viruses as influenza. Causing one to three days of symptoms, including nausea, vomiting, diarrhea and stomach pains, norovirus can easily spread and is

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