repeatedly puncture the skin, causing a controlled, localized infection that blistered, scabbed, and left a small indentation upon healing.
The United States ended routine smallpox vaccination for the general public in 1972, and the disease was declared eradicated globally in 1980—meaning that almost no one today has been vaccinated against smallpox or bears such a scar.
Having a scar does not mean you are still immune. Research indicates that immunity to smallpox lasts for approximately 5–10 years following vaccination.
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