If this is all known facts, that mass non-sterilizing vaccination during an outbreak causes evolutionary pressure and viral mutation, who is promoting the exact opposite theory. Than unvaccinated individuals are creating mutations that are prolonging the pandemic. Ive seen this claim a million times amongst NPCs and it kid quite uninformed. They didnt critically piece that together themselves. Who started it?

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Neither a borrower nor a lender be;
For loan oft loses both itself and friend,
And borrowing dulls the edge of husbandry.
-Polonius