What is the science behind the UK's coronavirus distancing rules?

Experts reveal why the 2-metre guidance matters and the importance of opening doors and windows

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Since the coronavirus outbreak reached the UK, health officials have recommended people stay at least 2 metres apart to reduce their risk of picking up the infection or spreading it to others.

But in recent weeks, as the impact of the lockdown on the economy has become clearer, the government has come under increasing pressure to relax the physical distancing rules so pubs, cafes and restaurants and other businesses can reopen fully.