CARDIFF, WALES - DECEMBER 08: A member of staff poses with a phial of Pfizer-BioNTech Covid-19 vaccine at a vaccination health centre on the first day of the largest immunisation programme in the UK's history on December 8, 2020 in Cardiff, United Kingdom. Wales joined the other UK nations in rolling out the covid-19 vaccine on Tuesday, a rare moment of coordination after months of disjointedness in the four nations' pandemic response. Wales introduced a 17-day "firebreak" lockdown in October and November to suppress the surge in covid-19 cases, but infections have continued to rise. (Photo by Justin Tallis - Pool / Getty Images)
