The Last Major Smallpox Outbreak in America

Smallpox, a deadly disease caused by the variola virus, was eradicated through vaccination efforts. The last major outbreak in the U.S. occurred in 1947 in New York City, where effective disease control limited the impact. Early immunization practices like variolation evolved into vaccination, pioneered by Edward Jenner using cowpox. The global eradication campaign, led by the WHO, employed ring vaccination to contain outbreaks, culminating in the last natural case in 1977. Smallpox is now extinct, with remaining virus stocks secured in the U.S. and Russia.

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