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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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CDC's new guidance for persons fully vaccinated: OK for small groups indoors, but still masks in public

The Centers for Disease Control and Prevention on Monday issued long-awaited advice to Americans fully vaccinated against Covid-19, freeing them to take some liberties that the unvaccinated should not, including gathering indoors in small groups without precautions while still adhering to masking and distancing in public spaces.

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