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Background and Purpose
To protect against SARS‐CoV‐2 infection, the first mRNA‐based vaccines, Spikevax (mRNA‐1273, Moderna) and Comirnaty (BNT162b2, Pfizer/Biontech), were approved in 2020. The structure and assembly of the immunogen—in both cases, the SARS‐CoV‐2 spike (S) glycoprotein—are determined by a messenger RNA sequence that is translated by endogenous ribosomes. Cardiac side‐effects, which...