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As Covid mutates, the vaccine makers are adapting too
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The speed at which scientists worked to develop the first Covid jabs was unprecedented. Just nine months after the UK went into lockdown, 90-year-old Margaret Keenan officially became the first person in the world outside a trial to receive the Pfizer/BioNTech vaccine. But the virus is mutating, and the emergence of the Omicron variant last month is already focusing attention on the next generation of jabs.
So what do we know about the new Covid-19 vaccines? One change is with delivery mechanisms, such as San Francisco firm Vaxart’s vaccine-in-a-pill, and Scancell’s spring-powered injectors that pierce the skin without a needle. But the biggest development is in T-cell technology. Produced by the bone marrow, T-cells are white blood cells
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