The UK has become the first country to approve Pfizer/BioNTech coronavirus vaccine for use at a large scale.
British regulator, the MHRA, says the jab, which offers up to 95% protection against Covid-19 illness, is safe for rollout.
Initial details say that immunizations could begin within days for people in high priority groups.
About the vaccine
The vaccine approved by the UK is a new type called an mRNA vaccine in which a small fragment of genetic code is used from the pandemic virus to enable the body to how Covid-19 and build immunity.
Experts say that the vaccine must be stored at around -70C. Special boxes packed in dry ice will be used to transport it. It can be kept for up to five days in a fridge.
Who will avail it and when?
Experts have made a provisional priority list. They have targeted people at the highest risk. Care home residents, staff, people over 80, and other health and social care workers are at the top.
They are likely to receive the first stocks of the vaccine, some may get before Christmas. According to BBC, mass immunization of everyone over 50, as well as younger people with pre-existing health conditions, can happen as more stocks become available in 2021.
The UK has already ordered 40m doses. These doses will be enough for 20m people with two shots each.
However, health experts are still warning people to remain vigilant and follow preventive measures against coronavirus.