Global biopharmaceutical company Sanofi (NASDAQ: SNY) encountered setbacks while developing its COVID-19 vaccine, and only this year reported results from late-stage clinical trials. Sanofi opted for the more traditional protein-based technology for its COVID-19 vaccine, Vidprevtyn, rather than the mRNA technology of Pfizer-BioNTech's Comirnaty and Moderna's Spikevax. The mRNA technology delivers genetic code instructing the body's cells to make the protein, while the more traditional approach produces the protein in a lab before injecting it into the body.
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