We are present at the European Radon Week 2020 in Vienna. A week dedicated to Radon, where the latest scientific results are presented and where work is being done on the harmonization of Radon measurement methods. An important opportunity to confront and understand what is happening in other states of the European Union, especially at this time when, finally, the transposition of Directive 2013/59 / Euratom is almost at the finish. We are ready to take on this new challenge.