The survey, which is being deployed in all EU countries, collects information on the main aspects of the population's health conditions and the use of health services. The results of the survey enable each country to monitor the main local health aspects, and thus design health plans that meet citizens' needs, as well as contributing to the definition of European policies. The survey is prescribed by EU Commission Regulation No 255/2018 of 19 February 2018 (implementing Regulation EC No 1338/2008 of the European Parliament and of the Council on Community statistics on public health and health and safety at work as regards statistics based on the European Health Interview Survey - EHIS).