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Is there a reason they don't create the protein in Vito and them inject it as a vaccine? I would imagine they could use in Vito cells to generate a lot of spike proteins.

Are they using mRNA because it's easier to manufacture? Or is the protein too instable?

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the protien, and the mRNA would be instantly degraded outside the cell.

the liposomal capsule holding the mRNA has been engineered to deliver the mRNA to the cell and fuse with it delivering the mRNA

confoundingly the mRNA is fragile thus the ultracold dryice freezer required for holding.

the protien is stable on its own, but will be destroyed by exocytic proteases unless shielded by insertion into a membrane

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