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The growth rate of COVID-19

We all now know about R, but sometimes it can be good to consider another number: the growth rate of an epidemic.
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The maths behind combining R ratios

In a previous article we introduced the problems that can arise when combine the reproduction ratios of a disease in different settings, such as hospitals and the community. In this article we dive into the maths that helps you get to the bottom of these problems.

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The problem with combining R ratios

We explore why you need to be extremely careful when combining the reproduction ratios of a disease in different settings, such as hospitals and the community.
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How to resolve the Premier League

As football leagues around the world have been suspended due to COVID-19, how should the final rankings of teams be decided? Here is a suggestion.