The first successful vaccine was developed by Edward Jenner in 1796.
✓ TRUE FACT
Jenner’s 1796 work used cowpox to protect against smallpox, launching modern vaccination. It was a breakthrough in preventive medicine long before germ theory was fully accepted.
🤯 "The first successful vaccine was developed by Edward Jenner in 1796. Science: 1, smallpox: 0."