In the midst of the emergency linked to the spread of the COVID-19 virus (known to most as “coronavirus”), the search for possible solutions for the containment of the pandemic has now taken on a supranational dimension, recording the first contributions from European institutions. The possibility of monitoring population movements through the analysis of data collected by mobile communication devices, in order to verify the effectiveness of the restrictive measures imposed and the identification of connections between movement trends and contagions, is undoubtedly one of the options on the table. The European Data Protection Supervisor (“EDPS”), consulted by the European Commission, has therefore identified some elements to be taken into account in the implementation of such solutions.