“Food-borne viruses are the second most important cause of food-borne outbreaks in the European Union (EU) after Salmonella. EFSA has today published a review of the latest scientific knowledge on these viruses providing advice on possible measures to control and prevent their spread in the EU. The assessment recommends among others that mitigating measures should focus on the prevention of contamination rather than removing the virus from contaminated food”
This information is expanded upon here. There is also a link to an opinion on Hepatitis E.