U.S. CDC has yet to weigh in.
The Public Health Agency of Canada collaborated with federal and provincial public health partners, the United States Centers for Disease Control and Prevention (U.S. CDC), and the U.S. Food and Drug Administration to investigate an outbreak of norovirus and gastrointestinal illnesses involving five provinces: British Columbia, Alberta
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According to
Even more oysters recalled over Norovirus risk.
Seattle King County Public Health is investigating an outbreak of norovirus-like illness associated with vomiting, diarrhea, abdominal pain, and chills at Il Terrazzo Carmine in Seattle.
The 

The Chicago Department of Public Health is warning city residents not to serve or eat raw oysters that were linked to a norovirus outbreak that has impacted more than a dozen states, including Illinois.