Coronavirus R0: What is the R number and why does it matter? – BBC News

Earlier this week, Prime Minister Boris Johnson said the UK needed to keep the UK’s R rate below a “catastrophe” to avoid a “catastrophe”.

But what is the number R and why does it matter?

BBC health correspondent Laura Foster explained what the government is doing and why it matters.

Video by Terry Saunders, Laura Foster and Tobias Chapple

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