Coming up today... we revisit the idea of herd immunity for Covid-19 and consider how the Delta variant is causing travel chaos.

The stories we talked about this week:

The UK’s summer of travel chaos https://www.wired.co.uk/article/uk-green-list-travel-holidays

We might never reach herd immunity https://www.wired.co.uk/article/covid-19-herd-immunity

Music by Filip Hnizdo Produced and edited (remotely) by Matt Burgess Learn more about your ad choices. Visit podcastchoices.com/adchoices