The Covid-19 coronavirus vaccination programme â€œis all about speedâ€, a member of the Joint Committee on Vaccination and Immunisation (JCVI) has said.
Professor Adam Finn also said the UK had to â€œact immediately and not waitâ€ after the discovery of the Omicron variant.
He told BBC Breakfast: â€œThis is a programme which is all about speed.
â€œSo the two challenges are going to be the logistics of actually delivering so much vaccine in a very short time and of course, itâ€™s important that people come forward and receive those jabs in good time so that they can build up that extra immunity that we need to be sure that weâ€™re protected against this new variant.
â€œSo challenging month ahead for the NHS.â€
Asked about the current pressures currently facing the NHS, he added: â€œThe worry is that if you give somebody double work to do, they canâ€™t do whatever else it was that they would have been doing.
â€œHere in Bristol where weâ€™re actually recruiting people into the scheme, training people up to give vaccines to get extra pairs of hands, focusing not only on retired healthcare staff, but actually just members of the public who are willing and able to come forward.
â€œSo there really is going to be a big build up to try and deliver this accelerated programme and Iâ€™m sure that is going on all over the country.â€
Professor Finn also said that the UK had to â€œact immediately and not waitâ€ after the discovery of the Omicron variant.
He told BBC Breakfast: â€œI do think we need to take this seriously.
â€œIt is a possibility that this will not turn out to be a major problem but there are lots of signs that suggest that it might.
â€œIt looks like itâ€™s quite a transmissible virus. We donâ€™t really yet know whether it causes worse disease. It may well not do that.
â€œBut the main question is whether itâ€™s able to evade the immunity that weâ€™ve got to some extent from the vaccine so far and the infections weâ€™ve all had.
â€œAnd so because of that, and because of the possibility of a major wave, the thing to do now is to act immediately and not wait.â€
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