The efficacy of vaccines is estimated from trials, using statistical techniques.

Because the vaccine may not stop transmission of the virus.

Yes the approved vaccines are safe. If you balance the risks, then taking the vaccine is much safer than taking your chances with COVID-19.

We are all longing to go into a lower tier, but this can come at a high price later on.

Our favourite communicator of risk talks about the statistics of COVID-19, the quality of government briefings, and how to counter misinformation.

In this short video Clement Twumasi tells us about his work helping to understand a parasite that has been decimating fish populations around he world.

What can maths tell us about how to make universities safe from COVID-19?

How can we all get back to work safely in the face of a lingering pandemic?

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

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.

Mathematical models can help the nation return to (some sort of) normality.

Listen to Plus editor Rachel Thomas explain herd immunity on the Guardian Weekly Science podcast.