<iframe src="//www.googletagmanager.com/ns.html?id=GTM-K3L4M3" height="0" width="0" style="display:none;visibility:hidden">

World

The rule of four: how to make sense of Covid case numbers

25 September 2020

8:43 PM

25 September 2020

8:43 PM

Are Covid cases doubling or not? And if so, in what time frame? If you listened to Boris Johnson and chief scientific adviser Patrick Vallance, you’d be forgiven for being confused. The Prime Minister said this week:

‘The chief medical officer and chief scientific adviser warned that the doubling rate for new cases could be between seven and 20 days.

Already a subscriber? Log in

Easter flash sale:
10 issues for $1

Subscribe this Easter and get the next 10 issues of the magazine, plus website and app access, all for just $1.

  • Weekly delivery of the magazine
  • Unlimited access to spectator.com.au and app
  • Spectator Australia podcasts and newsletters
  • Full access to spectator.co.uk
Or

Unlock 3 articles a month

REGISTER


Comments

Easter flash sale: 10 issues for $1

Join the conversation with other Spectator Australia readers. Subscribe to leave a comment.

Already a subscriber? Log in

Close