The Covid Virus Keeps Evolving. Why Haven't Vaccines? - WIRED

Updating the shots to adapt to rapidly changing variants is easier said than done, even with new mRNA technology.

On March 16, 2020, the first volunteer received a shot of Modernas then-experimental Covid-19 vaccine, just 63 days after the company had generated a genetic blueprint of the new virus. But Modernas … [+2812 chars]

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