The smallpox vaccine was unlike most modern vaccines. It used a bifurcated needle, a small two-pronged instrument dipped into the vaccine solution. The skin was pricked several times quickly, introducing the vaccine into the dermis.
The vaccine contained a live virus called vaccinia, related to smallpox but far less dangerous. After vaccination, a blister formed, then scabbed and healed, leaving behind the distinctive circular scar recognized around the world.
For many, that scar became a symbol of protection—a visible reminder that they were immunized against one of history’s deadliest diseases. Today, few people under 50 have the mark, as smallpox vaccination is no longer needed.
The eradication of smallpox stands as one of humanity’s greatest medical victories. Those who still bl bear the smallpox scar carry a living piece of history—proof of science’s triumph over a once-unstoppable killer.
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