‘We are essentially waiting for a vaccine. A vaccine is not five months away. We know it’s at least 12 to 18 months away. So we will have difficult choices to make’

The UK could face indefinite lockdown without a vaccine against coronavirus, according to scientists whose modelling of how the disease could sweep through the country overwhelming the NHS and killing more than 250,000 Britons, forced Boris Johnson’s change in tack today.

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