Discover why vaccines are named after cow pus. In 1796, English doctor Edward Jenner noticed milkmaids who caught cowpox never developed smallpox, leading to the first vaccine. The word's Latin roots literally mean 'of or relating to cows'—a fitting tribute to bovine biology's role in medical history.

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Deep in the Stacks (daily jazz vinyl) | Required Drinking (cocktail history) | Photography Knowledge (daily photo tips)
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