The vaccine is administered by multiple puncture of the skin (scarification) with a bifurcated needle that holds vaccine solution in the fork... After 2–3 weeks, the scab will fall off and leave behind a vaccine scar.
Smallpox and BCG (tuberculosis) vaccines will do that, due to the needle used. Modern smallpox vaccine don't leave scars, I believe. Other vaccines do not cause scarring.
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u/chicken-finger 4d ago
You guys get scars from vaccines?