Noroviruses are part of a group of viruses understood to be the most common cause of stomach upset. They cause nausea, vomiting and diarrhea, and people may also have a fever and head and muscle pains.
Although an individual’s symptoms may pass in one or two days, the disease is highly contagious and remains in the faeces for several weeks afterwards.
Finland was hit by outbreaks of the bug in May and June, and analysis confirmed that Polish raspberries were the cause. The fruits are now suspected as having caused the new cases have been reported in the south since the beginning of this month.
In order to safeguard against infection, users of foreign frozen raspberries should heat the fruit to 90 ºC for at least two minutes, says Evira. Slight heating after defrosting is mot enough to ensure the raspberries are safe.
Aporte: Deinan Romero