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A virus evolution expert explains what researchers know – and what they don’t – about the Omicron variant

Omicron is very unusual in that it is by far the most heavily mutated variant yet of SARS-CoV-2, the virus that causes COVID-19, and researchers are studying various aspects of the COVID-19 virus, including its spillover into animals.... Read more»


Sequencing used to identify Delta, other coronavirus variants

False and misleading claims have recently sought to not only cast doubt on the seriousness of the Delta variant of the novel coronavirus, but question its existence.... Read more»

Unraveling the mysterious mutations that make Delta the most transmissible COVID virus yet

The Delta variant of the coronavirus has kept some of the most successful mutations found in earlier variants, but also contains new genetic changes that enable it to spread twice as fast and have a shorter incubation than earlier versions of the COVID virus.... Read more»