Up to 70 hospitals in Great Britain will start vaccinations against the coronavirus on Tuesday.
According to Health Secretary Matt Hancock, the biggest vaccination campaign in British history starts in major hospitals.
He thinks it will take until spring for all vulnerable people to be vaccinated. Only when that has been done can the restrictions intended to contain the virus be lifted.
Margaret Keenan, 90, was the first British person to receive the vaccine from Pfizer and BioNTech on Tuesday morning.