Previously, to diagnose norovirus, it was usually necessary to analyze the stool and vomit of infected persons, using specialist devices such as electron microscopes to detect norovirus particles, genes, and proteins. Recently, a rapid diagnostic technique that can provide a result in 15 minutes used a stool sample has been developed and is now being used in clinical settings.

There is no therapeutic agent for norovirus, unlike the antiviral drugs available to treat influenza. The basic approach is to use symptomatic therapy, including drinking plenty of water to prevent dehydration, getting enough rest, and ensuring a good level of nutrient intake. If the patient becomes dehydrated, an oral rehydration solution may be needed. Ask your doctor about how to deal with dehydration.