Motivated after a string of food-borne illnesses surrounding berry products put the international community on alarm, epidemiologists have created a reference guide for the safety of fresh and frozen berry products, Food Quality News reports. The guide classifies all berry outbreaks that occurred between 1983 and 2012 and breaks down the scares by location, the source of the tampered fruits and the likelihood that it actually caused the outbreak. It also classifies whether the cause of a specific food-borne illness was either viral or parasitic. Over the past decade, outbreaks of both the norovirus and the hepatitis A virus (HAV) linked to mixed-berry products have sickened tens of thousands of people worldwide.

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