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Two New Viral Variants — 1 Comment

  1. Note that a variant is not a “strain.” The latter term is reserved for a variant with a measurably distinct behavioral difference: for example making a virus more infectious, or causing different symptoms or a more severe form of disease. To be called a new strain a variant must affect viral fitness and/or clinical outcome. There has only been one single strain of SARS-CoV-2 in mankind’s brief acquaintance with it, though dozens of variants and thousands of mutations have been tracked.

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