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What It Would Take for Herd Immunity to Stop the Coronavirus Pandemic – The Wall Street Journal

https://www.wsj.com/articles/what-it-would-take-for-herd-immunity-to-stop-the-coronavirus-pandemic-11600594201

The concept of herd immunity is at the heart of worldwide vaccination efforts and discussions about next steps in combating the Covid-19 pandemic and reviving economies.

For the pandemic to stop, the coronavirus has to run out of prone hosts to infect. Herd resistance takes place when enough people in a population develop an immune action, either through previous infection or vaccination, so that the infection cant spread easily and even those who arent immune have defense.