Louis Pasteur handwritten and signed letterA handwritten, signed letter from Louis Pasteur Written in 1885 the same year Pasteur discovered the vaccine for rabies Louis Pasteur (1822 1895) was a French microbiologist and chemist whose pioneering research has saved millions of lives. Pasteur discovered: That germs cause disease, which led to the introduction of sterilisation and hand washing in hospitals Vaccines for rabies and anthrax. Pasteur found that exposing people to a weak form of a