Joseph James Whitworth of Food Quality News writes 10 people have been sickened by norovirus after eating raw oysters at Danish restaurants.

Fødevarestyrelsen (Danish Veterinary and Food Administration) said oysters are from Lemvig.

The agency has closed the area in Lemvig for commercial harvest of mussels and oysters and is monitoring it.

Illnesses can be avoided if oysters are cooked to an internal temperature of 90° Celsius/194° Fahrenheit for a minimum of 90 seconds.