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Five reasons why COVID herd immunity is probably impossible
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Five reasons why COVID herd immunity is probably impossible

Christie Aschwanden About 50% of Israel’s population has so far been fully vaccinated against COVID-19, yet herd immunity remains elusive. Credit: Kobi Wolf/Bloomberg/GettyPDF version 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...