Norovirus cases continue to climb in the US, especially in the Northeast, CDC data shows CNNFDA Advises Restaurants and Retailers Not to Serve or Sell and Consumers Not to Eat Certain Oysters from Baja California, Mexico Potentially Contaminated with Norovirus FDA.govNorovirus cases soar in California. Here are signs to watch for San Francisco ChronicleIt’s peak norovirus season. Here’s what you can do to avoid getting sick WPRI.comNorovirus cases on the rise in New England WGME