Two years later, coronavirus evolution still surprises experts. Here’s why.

Raul Andino knows his pathogens. For more than 30 years the University of California, San Francisco researcher has studied RNA viruses, a group that includes the virus that causes COVID-19. And yet he never imagined he’d witness a pandemic of this scale in his lifetime. “The magnitude of it and the implications of it are…

Two years later, coronavirus evolution still surprises experts. Here’s why.

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