Principal Investigators: Dr. Silvia Sánchez Ramón, from the Immunology Service, with the collaboration of Dr. Alberto Ocaña and Dr. Pedro Pérez Segura from the Medical Oncology Service and CRIS UNIT for New Experimental Therapies Centres: Hospital Clínico San Carlos. Current situation SARS-Cov-2, the coronavirus that has led to the COVID19 epidemic, has marked a turning