Penny K. Riggs

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Messenger RNA carries the instructions for life from DNA to the rest of the cell. ktsimage/iStock via Getty Images Plus

What is mRNA? The messenger molecule that’s been in every living cell for billions of years is the key ingredient in some COVID‑19 vaccines

Penny K. Riggs, Texas A&M University

In the spotlight for its role in COVID-19 vaccines – and a Nobel Prize – mRNA is not a new invention. It’s a crucial messenger molecule at work every day in every cell in your body.

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