Less than 10% of people in Britain are immune to coronavirus. There's no room for mistakes | Rupert Beale

Covid-19 is is still a threat to most in Britain. If we allow it to spread now, a deadly second wave in winter could be the result

• Dr Rupert Beale heads the cell biology of infection laboratory at the Francis Crick Institute in London
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The lockdown approach to combating Covid-19 has been undeniably effective. The surge in cases was stopped, the NHS was not overwhelmed, and many deaths were prevented. At the Francis Crick Institute, we could see the dramatic effect on cases, as we've been testing for Sars-CoV-2 to support our local hospitals. When we ran our first samples, at the peak of the first wave, nearly half were positive. Now we see perhaps one or two positive samples in a thousand.

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