Could a nasal vaccine finally banish Covid? The ‘key weapon’ locked away in a Bangladesh lab could be the answer to stopping respiratory viruses in their tracks

The emergence of a new, ‘highly infectious’ Covid variant — responsible for more than 40 per cent of cases in the U.S., where hospitalisations reached more than 40,000 a day in December — is a grim reminder that the pandemic is far from over.

This comes as concerns rise about the effects of China’s reversal of its zero-Covid approach, leaving its huge population, who have little natural immunity to the virus, able to resume normal life and travel.

Even here, despite most of the population having booster after booster, there are around 9,000 people in hospital with Covid in England alone. That’s up from 4,900 at the beginning of December, according to NHS data.

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