USA: Scientists warn of increased risk of norovirus infection from oysters

The U.S. Centers for Disease Control and Prevention reports that noroviruses, a major cause of gastroenteritis, are responsible for approximately 21 million illnesses annually. These viruses are infamous for their ease of transmission, posing a significant risk to the food service and shellfish production industries. Most norovirus outbreaks in the U.S. are reported in restaurants and food service establishments, with an estimated 2,500 cases annually, especially during the fall and winter seasons.