Millions of booster jabs are being delivered across the country in the run up to Christmas. The NHS is ramping up its Covid-19 vaccination programme amid concerns that the new Omicron variant of coronavirus is spreading rapidly in the community.
The government has said that a third 'booster' shot of the vaccine is the best way of protecting yourself against the new highly transmissible strain, and is now offering jabs to all eligible adults over the age of 18.
But how long does it take for a booster jab to become effective? Vaccines expert Professor Adam Finn said protection from the booster vaccine comes relatively quickly because the body already recognises the vaccine.
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