Day 220 of 365
August 8
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Health The Development of Vaccines
Edward Jenner created the first vaccine in 1796, using cowpox to protect against smallpox. Vaccines work by training the immune system to recognize pathogens. They've eradicated smallpox and nearly eliminated polio, saving an estimated 154 million lives in the past 50 years.
💡 Did you know?
The word 'vaccine' comes from 'vacca,' Latin for cow, honoring Jenner's cowpox discovery!
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