Forget what you’ve read and herd ... immunity is still a long way off

Delta variant is moving the goalposts for ending the pandemic, Covid may be present for a century — or longer

16 August 2021 - 19:34 By Michelle Fay Cortez

As Covid-19 surged last year, governments worldwide touted the hope of “herd immunity”, a promised land where the virus stopped spreading exponentially because enough people were protected against it. That’s now looking like a fantasy.

The thinking was that the pandemic would ebb and then mostly fade once a chunk of the population, possibly 60% to 70%, was vaccinated or had resistance through a previous infection. But new variants like Delta, which are more transmissible and have been shown to evade these protections in some cases, are lifting the bar for herd immunity to near impossibly high levels...

This article is free to read if you register or sign in.

If you have already registered or subscribed, please sign in to continue.

Questions or problems? Email or call 0860 52 52 00.