The UK has become the first country in the world to approve the COVID-19 vaccine developed by Oxford University and AstraZeneca.
The news comes as the country battles a huge surge in cases, including some caused by a new variant of the virus which is thought to spread more quickly.
The Oxford-AstraZeneca vaccine was distributed at the end of December and will enable the UK to increase the speed at which it administers the jab across the population.
The UK has ordered 100 million doses of the vaccine, which is enough to vaccinate 50 million people. Each person requires two full doses, up to three months apart, for it to be effective.
With the Pfizer-BioNTech vaccine already being rolled out across the country, the UK now has enough doses of approved jabs to cover the entire population.
UK Prime Minister Boris Johnson has labeled the news a “triumph” and says healthcare workers will begin vaccinating people “as quickly as possible.”