New European multi-stakeholder cross-sectoral collaboration accepted for publication in Frontiers in Immunology, special collection: Definition of the Immune Parameters Related to COVID-19 Severity. This has been a huge collaborative effort led by Morgane Bomsel between many academic and medical institutes in France (CNRS as LEAD, Université de Versailles Saint-Quentin-en-Yvelines and Assistance Publique Hopitaux De Paris), Italy (San Raffaele Scientific Institute and San Raffaele Hospital) and the UK (Medway School of Pharmacy University of Kent VPU and University of Oxford). Many thanks from me go to Lucia Lopalco, Gabriel Siracusano and Diego Cantoni. Looking forward to celebrating with the whole team at some future time and place (Paris or Milan ?).