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Is there a limit to coronavirus mutations?

5 years 8 months ago
It's normal for viruses, including SARS-CoV-2, to mutate. But is there a limit to how much the virus can mutate and still make people sick — or can the virus just continue to evolve indefinitely?

AstraZeneca expects updated COVID-19 vaccine by autumn

5 years 8 months ago
AstraZeneca said Thursday it expects to have a new version of its COVID-19 vaccine ready for use by this autumn as drugmakers respond to concerns about emerging variants of the disease that may be more transmissible or resistant to existing vaccines.
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