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The British scientist who led the research underpinning AstraZeneca's coronavirus vaccine said at the weekend that a new jab could be developed against the emerging Omicron variant "very rapidly" if needed. Professor Andrew Pollard, director of the Oxford Vaccine Group, also said existing vaccines should work against the new strain, but that would only become apparent after more research in the coming weeks. "It's extremely unlikely that a reboot of a pandemic in a vaccinated population like we saw last year (with the Delta variant) is going to happen," he told BBC radio. But if required, "The processes of how one goes about developing a new vaccine are increasingly well-oiled, so if it's needed that is something that could be moved very rapidly." In a statement, AstraZeneca said it had "developed, in close collaboration with Oxford University, a vaccine platform that enables us to respond quickly to new variants that may emerge".

Britain has become the first country to approve a Codiv-19 vaccine that targets both the original and Omicron variant of the virus. Medicines regulator MHRA approved the so-called bivalent vaccine made by US drug company Moderna as a booster for adults. The agency's decision was based on clinical trial data that showed the booster triggered "a strong immune response" against both Omicron (BA.1) and the original 2020 virus, it said. The MHRA also cited an exploratory analysis in which the shot was also found to generate a good immune response against the currently dominant Omicron offshoots BA.4 and BA.5. "The first generation of Covid-19 vaccines being used in the UK continue to provide important protection against the disease and save lives," MHRA chief executive June Raine said in a statement. "What this bivalent vaccine gives us is a sharpened tool in our armoury to help protect us against this disease as the virus continues to evolve."