It is surmounting difficulties that makes heroes.

Legal risk was not the only kind Pasteur undertook. Pasteur also made many discoveries in the field of chemistry most notably the molecular basis for the asymmetry of certain crystals. This discovery revolutionized work in infectious diseases and Pasteur gave these artificially weakened diseases the generic name of "vaccines" in honour of Jenner's discovery.

: /ˈluːi pæˈstɜr/ French: [lwi pastœʁ]; December 27 1822 – September 28 1895) was a French chemist and microbiologist who was one of the most important founders of medical microbiology. He is regarded as one of the three main founders of microbiology together with Ferdinand Cohn and Robert Koch. Pasteur also made many discoveries in the field of chemistry most notably the molecular basis for the asymmetry of certain crystals.