B-C Centre for Disease Control is investigating following an outbreak of illness associated with consuming undercooked oysters. Dr. Eleni Galanis says more than 70 cases of illness have been reported since early December and more are expected. Galanis says people need to cook oysters thoroughly at a temperature of 90 degrees celsius for 90 seconds in order to kill norovirus and other bugs. Anyone who becomes ill after eating shellfish should call B-C HealthLink at 8-1-1.