Efforts underway to understand the new coronavirus variant spotted in four countries

Scientists race to understand highly mutated coronavirus variant spotted in four countries, including the US | CNN A highly mutated new variant of the virus that causes Covid-19 has countries on alert as scientists scramble to understand how far it has spread and how well our immunity will defend against it. Brenda Goodman CNN

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Only six sequences of BA.2.86 have been reported in four countries, but epidemiologists are worried they could represent many more because worldwide monitoring of variants has dropped off.

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