Excellent find. Since I have* PhDs in marine biology and immunology, this find made me curious. Did the British ruin their own race through inadequate sewage treatment or did they not? So it appears that people contaminate shallow waters with the norovirus the exact same way they do with e.coli.
*The working group concluded there were several transmission routes of norovirus into the marine environment. All originated from human sewage sources. *
http://www.bccdc.ca/health-professionals/professional-resources/norovirus-marine-water-contamination
*(I don’t)