Louis Pasteur, the pioneer of immunology, lived at a time when thousands of people died each year of rabies. Pasteur had worked for years on a vaccine. Just as he was about to begin experimenting on himself, a 9-year-old, Joseph Meister, was bitten by a rabid dog. The boy’s mother begged Pasteur to experiment on her son. Pasteur injected Joseph for ten days--and the boy lived.
Decades later, of all the things Pasteur could have had etched on his headstone, he
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