An Israeli Magen David Adom medical administers a dose of the Pfizer-BioNtech vaccine against the coronavirus for children to a young boy, in the Israeli town of Ramat Gan near Tel Aviv, on December 23, 2021. – Israelis over the age of 60 and medical teams will be eligible for a fouth Covid vaccination, following the recommendation of an expert panelas the Jewish state struggles to contain the spread of the Omicron variant, imposing travel and other restrictions while avoiding a domestic lockdown. (Photo by JACK GUEZ / AFP)