Louis Pasteur (1822 – 1895) French microbiologist and chemist, made remarkable breakthroughs in the causes and prevention of diseases and invented the process of Pasteurization. Louis Pasteur discovered that microbes were responsible for souring alcohol and came up with the process of pasteurization, where bacteria is destroyed by heating beverages and then allowing them to cool. His work in germ theory also led him and his team to create vaccinations for anthrax and rabies.