Hepatitis A caused by blueberries Albert Heijn: what are the symptoms and how do you prevent infection? | Domestic

Albert Heijn has immediately removed the 1 kilo freezer bag of blueberries from the stores. According to the company, the product may be contaminated with hepatitis A. And according to the RIVM, hundreds of people may have been infected with hepatitis A through the blueberries. How exactly does that work? Five questions.