Why are mRNA vaccines so exciting? - Harvard Health
https://www.health.harvard.edu/blog/why-are-mrna-vaccines-so-exciting-2020121021599
WebNov 1, 2021 · The very first vaccines approved in the US to prevent COVID-19 were an entirely new type: mRNA vaccines. Over the past year, the Pfizer/BioNTech and Moderna mRNA vaccines have proven unusually effective and safe. How do mRNA vaccines differ from traditional vaccines, and what makes them so exciting? How traditional vaccines …
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