A model holds a card which will be given to patients following their vaccination for COVID-19 at Croydon University Hospital in south London on December 5, 2020, where the first batch of COVID-19 vaccinations has been delivered to the area. - Britain has pre-ordered 40 million doses of the Pfizer-BioNTech vaccine in total, and is set to receive an initial batch of 800,000 to kickstart Tuesday's rollout. Elderly care home residents and their carers will be the very first in line, followed by those aged 80 and over and frontline health and care staff. (Photo by Gareth Fuller / POOL / AFP) (Photo by GARETH FULLER/POOL/AFP via Getty Images)
