Today came the welcome news that the first UK patient has been vaccinated with the highly-anticipated Oxford jab - but how does it compare to the other injections?
The vaccination, developed by Oxford University and drug firm AstraZeneca, was administered to 82-year-old Brian Pinker at Oxford University Hospital.
It has been hailed as a huge breakthrough that will start to bring the coronavirus nightmare to an end - although there are still questions over whether it can prevent people transmitting the virus.
Today Health Secretary Matt Hancock branded it a "triumph of British science", saying there are 530,000 doses of the Oxford vaccine ready to go.