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Rise of Variants in Europe adds to coronavius dangers

Europe, the epicenter of the coronavirus pandemic last spring, has once again swelled with new cases, which are inundating some local hospitals and driving a worrisome global surge of Covid-19.

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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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