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The AY.4.2 delta variant appears to be slightly more infectious and may be less likely to cause symptoms

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The delta variant could be overtaken by AY.4.2, a more transmissible coronavirus variant that may be less likely to cause symptoms, while another variant from central Africa is being closely monitored



Health



22 November 2021

A man receives a covid-19 vaccine in Duisburg, Germany

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INA FASSBENDER/AFP via Getty Images

After a period of relative calm in terms of the coronavirus’s evolution, further notable variants are now emerging. An offshoot of the delta variant, known as AY.4.2, appears to be slightly more infectious than the original delta, and could slowly replace it. Several other new variants are being monitored, including one that seems to have evolved undetected in Central Africa before spreading to Europe and beyond.

None of these emerging variants appear to be hugely more infectious or better at dodging immunity …

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