Blanket vaccination of children in the Prague 6 district against hepatitis A has been recommended by health officials following a serious incident of water contamination. Children between 12 months old and 15 years will qualify for free vaccinations from Friday. Around 32,000 people, including around 4,000 children, are believed to be at risk after drinking contaminated tap water in the area at the end of May. The contamination occurred when sewage water is believed to have seeped into a pipe carrying water for public consumption. The Prague Waterworks Company is now facing thousands of demands for compensation.