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2:28
YouTube
PBS NewsHour
How do mRNA COVID-19 vaccines work?
The first COVID-19 vaccines represent an incredible record-breaking achievement in vaccine development. Not only were the Moderna and Pfizer/BioNTech vaccines created in record time, they also harness a never-before-used technology: immunization through mRNA. But how do these vaccines protect us and how do they differ from other vaccines? These ...
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