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Overview of Covid-19 cases rising in much of the world--the Economist, with graphs

LIKE A STORY-BOOK villain, the covid-19 pandemic has a habit of fighting back from the brink of defeat. Last summer politicians were quick to assume that the coronavirus had been squashed, only for a second wave to engulf much of Europe and North America in the autumn.

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ANALYSIS: Five reasons why COVID herd immunity is probably impossible

https://www.nature.com/articles/d41586-021-00728-2

As COVID-19 vaccination rates pick up around the world, people have reasonably begun to ask: how much longer will this pandemic last? It’s an issue surrounded with uncertainties. But the once-popular idea that enough people will eventually gain immunity to SARS-CoV-2 to block most transmission — a ‘herd-immunity threshold’ — is starting to look unlikely.

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