Podcast
How do you calculate herd immunity?
Listen to Plus editor Rachel Thomas explain herd immunity on the Guardian Weekly Science podcast.
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.
What is herd immunity and what does it have to do with a number called R0?
How do mathematical models of COVID-19 work and should we believe them? We talk to an epidemiologist, who has been working flat out to inform the government, to find out more.