Norwalk Viruses Widespread  
   Gastrointestinal infection are often caused by the Norwalk virus or one of its many relatives. These viruses are second only to the common cold in the occurrence of viral illnesses in the US.
   http://healthlink.mcw.edu/article/1031002212.html

CDC : Noroviruses  
   The organism is also known as Norwalk-like viruses or caliciviruses. The disease is also known as stomach flu or viral gastroenteritis. Includes cause, treatment, and prevention.
   http://www.cdc.gov/ncidod/dvrd/revb/gastro/norovirus.htm

Norwalk Virus Gastroenteritis: A Different Type of Foodborne Illness, HYG-5569-98  
   Ohio State University Extension fact sheet providing basic information on the subject.
   http://ohioline.osu.edu/hyg-fact/5000/5569.html

Bad Bug Book: The Norwalk Virus Family  
   Includes symptoms, sources of infection, outbreaks, and prevention.
   http://vm.cfsan.fda.gov/~mow/chap34.html

eMedicine - Norwalk Virus  
   Article by Michelle A Jaworski, MD.
   http://www.emedicine.com/med/topic1648.htm

Norwalk Virus and Other Caliciviruses  
   Scientific and medical information about the virus.
   http://gsbs.utmb.edu/microbook/ch065.htm

Norwalk Virus Infection Facts  
   Factsheet on the disease with symptoms and prevention.
   http://www.astdhpphe.org/infect/norwalk.html

Norwalk Virus  
   Factsheet on the disease.
   http://www.lambtonhealth.on.ca/communicable/norwalk.asp

Food Safety Research Information Office: Norwalk Virus  
   Directory of press releases, articles, resources, and factsheets on the disease.
   http://www.nal.usda.gov/fsrio/topics/tpnorwalk.htm

BioMed Central :A summertime peak of "winter vomiting disease": Surveillance of noroviruses in England and Wales, 1995 to 2002  
   Research article on the disease.
   http://www.biomedcentral.com/1471-2458/3/13