Vaccines, experts divided on the third dose: “There is no proof that everyone is useful”

“Follow the science”: follow the science. It is the most often cited principle for beating Covid. But sometimes it’s easier said than done. Let’s take the third dose of the vaccine. On one aspect, science has clear ideas: the frail and the elderly need it. Italy has thus decided to offer the further recall first to patients with various diseases, then to over 80, guests of RSA and health workers.