Efforts to track SARS-CoV-2 sequences have helped identify worrying variants — but researchers are blind to emerging mutations in some regions.

中文翻译：

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令人震惊的 COVID 变异显示了基因组监测的重要作用

追踪 SARS-CoV-2 序列的努力有助于识别令人担忧的变异——但研究人员对某些地区的新突变视而不见。