A major breakthrough in the search for a coronavirus vaccine means it could be with us by December.
Initial results from the US pharmaceutical giant Pfizer and its vaccine partner BioNTech suggest their jab was 90% effective at protecting people from Covid-19.
And while it is still early days and there is no guarantee it will be the key to helping eradicate coronavirus, it is being heralded as a "scientific breakthrough" and a step towards a working jab.
Officials have warned that although the results are promising, more still needs to be done before it becomes available - and it needs to be cleared for use by the independent regulator.
But if the vaccine passes rigorous safety checks, a UK-wide NHS led programme of distribution would begin, the Prime Minister has confirmed, with hopes the first doses would be potentially available by Christmas.
A scientific adviser has said he is "quite optimistic" of enough Covid-19 vaccinations being carried out by Easter for normality to begin to resume, provided authorities do not "screw up" distribution of the jab.
Sir John Bell, regius professor of medicine at Oxford University, told MPs the announcement by Pfizer and BioNTech meant there could be two or three vaccines by the new year.
A member of the Government's vaccine taskforce, he said there was a 70 to 80% chance that the most vulnerable among the population could be vaccinated by Easter.
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