Edward Jenner discovered the vaccine for the prevention of smallpox in 1796. His pioneering work introduced the concept of vaccination to the world, using cowpox material to safely immunize against the deadly variola virus.

Historical Context

Smallpox ravaged populations for centuries, killing millions before Jenner's breakthrough. Folk knowledge among milkmaids suggested cowpox infection protected against smallpox, inspiring Jenner to test this systematically.

He inoculated 8-year-old James Phipps with cowpox pus, then exposed him to smallpox—proving immunity without illness.

Key Discoveries

  • 1796 Experiment : Jenner created the first vaccine by transferring cowpox from a milkmaid's lesion to Phipps.
  • Publication : In 1798, his paper "Inquiry into the Variolae Vaccinae" detailed findings, coining "vaccine" from Latin for cowpox.
  • Global Impact : Vaccination spread rapidly, leading to smallpox eradication by WHO in 1980.

Before Jenner

Variolation—scratching smallpox pus into skin—was practiced in Asia and Africa but risky, with 1-2% fatality and spread potential.

Jenner's safer method revolutionized medicine, earning him the title "Father of Immunology."

Modern Legacy

Today, smallpox is eradicated, but Jenner's technique underpins all vaccines. No recent discoveries alter this history; it's a settled fact.

TL;DR : Edward Jenner invented the smallpox vaccine via cowpox in 1796, ending a killer disease.

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