COVID-Health Basque Country Research Group- Janire Portuondo, Endika Munitiz, Julia Garcia (Basque Government Department of Health); Verónica Tiscar, Amaia Bilbao (Basurto University Hospital); Susana García-Gutierrez, Jose M. Quintana, Maria J. Legarreta, Ane Villanueva, María Gascón, Nere Larrea, Iratxe Lafuente, Cristóbal Esteban, Amaia Aramburu, Pedro Pablo España, Ane Uranga (Galdakao-Usansolo University Hospital); Iñaki Zorrilla (Bioaraba Health Research Institute); Irantzu Barrio (UPV/EHU); Dae-Jin Lee, Abelardo-Enrique Monsalve-Cobis, Lander Rodríguez (Basque Center for Applied Mathematics, BCAM).