This coronavirus mutation has taken over the world. Scientists are trying to understand why.

The more effective the spike protein, the more easily the virus can break into the bodies of its hosts…

The spike protein for SARS-CoV-2 has two parts that don’t always hold together well … viruses with the G variant had more spike proteins, and the outer parts of those proteins were less likely to break off. This made the virus approximately 10 times more infectious…

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