The oyster has, according to the National Food Agency, carried on the infection of norovirus which gives symptoms similar to winter vomiting. According to Uppsala municipality, most of those who became ill in Uppsala have eaten French oysters around New Year's Eve. The oysters eaten by Uppsalaborna have either been traded in stores or eaten at a restaurant, and Uppsala Municipality invites others who have been infected to contact the environmental administration and report this.

Very ill people are urged to contact the care, which some 70 people around the country have already done.

- We receive notifications and continue to interview people who have fallen ill. We also contact stores and restaurants where the oysters were purchased to see if there are oysters left so that we can get more information about the oysters, ”says Maria Wegscheider at the environmental administration at Uppsala Municipality in a press release.

French fishing areas closed

The National Food Agency suspects that it was mainly oysters from France that caused the disease outbreak. Many people have become stomach sick in several different countries such as the Netherlands and Italy. In France, hundreds have been poisoned by oysters during December and January, and several French fishing areas supplying oysters have been closed.