Fauci says delta Variant is the 'greatest threat' in our fight against COVID-19. Why?

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A highly transmissible SARS-CoV-2 variant called "delta" has spread to nearly 100 countries around the world, including to the U.S., where it's likely to soon become the dominant variant.

Fauci says delta Variant is the 'greatest threat' in our fight against COVID-19. Why? : Read more