epa08895097 A senior nurse handles a vial containing five doses of 0.3ml of the Pfizer-BioNTech COVID-19 vaccine at Shaare Zedek Medical Center in Jerusalem, Israel, 20 December 2020. Israel begins a nationwide COVID-19 vaccination campaign as hundreds of thousands of vaccines are delivered to hospitals across the country. First, the medical staff will be vaccinated and then people from high potential risk groups and the elderly population. Authorities hope to vaccinate as many people as possible.  EPA/ABIR SULTAN