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
from BBC News - Home https://ift.tt/3d8GpYw
Coronavirus: What is the R number and why does it matter?
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September 29, 2020
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