A study involving 84 volunteers showed that an experimental norovirus vaccine provided considerable protection against infection and symptoms of gastroenteritis, researchers from Baylor College of Medicine reported in NEJM (New England Journal of Medicine). The authors added that theirs is the first study to show protection from norovirus illness due to a vaccine. To date, the only treatment for norovirus illness is to take plenty of fluids to prevent dehydration, and drugs to treat the symptoms of diarrhea and vomiting.
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New England Journal of Medicine - "Norovirus Vaccine against Experimental Human Norwalk Virus Illness" (http://www.nejm.org/doi/full/10.1056/NEJMoa1101245)