South Tyrol has been the first region in Italy, and second in Europe only after Slovakia, to organise mass screening tests among all the population, to discover rapidly new infections by SARS CoV-2. As part of its didactics, ZeLIG is producing a feature length collective documentary about this big public event, which took place during three days at the end of November. 25 students, followed by supervisors and the school staff, have shot 9 episodes of the longer film, with different approaches, different perspectives, different points of view: we are at the editing stage and will be ready by the beginning of February 2021.