1885 – Louis Pasteur’s Rabies Vaccine:

In 1885, French scientist Louis Pasteur achieved a major breakthrough in vaccine development with the creation of the rabies vaccine. Pasteur’s work was prompted by a series of experiments in which he successfully attenuated the rabies virus, making it less virulent while still capable of stimulating an immune response. The first human to receive the rabies vaccine was a nine-year-old boy who had been bitten by a rabid dog. The vaccine proved effective, and this pioneering work marked a crucial moment in the prevention and treatment of rabies, demonstrating the potential of vaccines in protecting against deadly diseases caused by viruses.