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Coronavirus: What is the R number and why does it matter?

Experts keep discussing the value of R, but what is it and why does it matter?

from BBC News - Home https://ift.tt/3d8GpYw

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very funny

BJK Cup withdrawals 'a tennis, not a player, problem'

British captain Anne Keothavong says the lack of top-20 players at Billie Jean King Cup qualifying is "a tennis problem, not a player p...