In molecular biology, messenger ribonucleic acid ( mRNA) is a single-stranded molecule of RNA that corresponds to the genetic sequence of a gene, and is read by a ribosome in the process of synthesizing a protein.
mRNA is an important messenger, carrying the instructions for life from DNA to the rest of the cell. Getty Images One surprising star of the coronavirus pandemic response has been the molecule called mRNA. It’s the key ingredient in the Pfizer and Moderna COVID-19 vaccines. But mRNA itself is not a new invention from the lab.
1 Several countries have thus recommended a second booster dose of COVID-19 mRNA vaccine (ie, a fourth vaccine dose) in older and immunocompromised individuals at higher risk for severe disease, hospitalisation, and death. In Israel, protection conferred by a fourth dose of BNT162b2 (Pfizer-BioNTech) was shown against both SARS-CoV-2 infection 2
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