Omicron, why is it so easy for someone to get infected again? Pregliasco’s answer

After vaccination or an infection, we are protected from Covid for about four or five months. But not always: there are people who re-correct themselves immediately after finding a negative swab. Fabrizio Pregliasco, medical director of the IRCCS Galeazzi Orthopedic Institute of Milan, explains why it can happen

Interview by Cinzia Lucchelli

Editing by Lorenzo Urbani