When I was a child, I noticed a strange scar on my mother\u2019s upper arm\u2014a circle of small indents around a larger one. It fascinated me for a while, but like many childhood curiosities, I eventually forgot about it. Years later, seeing the same scar on an elderly woman\u2019s arm reignited my curiosity and led me to finally ask my mother about it.<\/p>\n
She reminded me that I already knew the answer: the scar came from the smallpox vaccine. Smallpox was a highly contagious and often deadly disease caused by the variola virus, marked by fever and a severe rash that left many survivors scarred. For centuries, it devastated populations until a global vaccination effort finally brought it under control.<\/p>\n
The smallpox vaccine was administered using a two-pronged needle that punctured the skin multiple times, introducing a live but less harmful virus called vaccinia. The body\u2019s reaction caused a blister that eventually scabbed over and healed into a permanent scar. That mark became a visible sign that someone had been protected against smallpox.<\/p>\n
Thanks to widespread vaccination, smallpox was declared eradicated worldwide in 1980, and routine vaccinations ended in the U.S. in the early 1970s. Today, the smallpox scar is a reminder of one of humanity\u2019s greatest public health achievements\u2014a lasting symbol of how global cooperation and vaccines eliminated a deadly disease.<\/p>\n","protected":false},"excerpt":{"rendered":"
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