Recalled oysters from British Columbia, Alberta, and Ontario due to norovirus in

The Canadian Food Inspection Agency has issued a recall due to possible norovirus contamination of  some oysters distributed in British Columbia, Alberta and  Ontario

The agency says the recall  affects certain Fanny Bay, Sunseeker and Cloudy Bay oysters  from the Taylor Shellfish Canada  brand.
The memo notes that most of the affected oysters were harvested and processed in early December, although some may have been harvested as early as  November 27.
The agency says consumers who purchased oysters should  throw them out or return  them to the  point of purchase, and those  with symptoms should seek medical  attention. Symptoms of norovirus, which can  appear 12 hours after exposure, include vomiting, diarrhea, nausea and stomach  cramps.
The agency says  that while most people who contract the virus recover within a  few days, some severe cases may require hospitalization and intravenous injections.