Karl Friedrich Louis (Louis Pasteur)

Louis Pasteur was a pioneering scientist known for his groundbreaking work in germ theory and microbiology. He demonstrated that microorganisms are the cause of many diseases and fermentation processes, leading to advancements in medicine, such as vaccines for rabies and anthrax. Pasteur also developed pasteurization, a method of heating liquids like milk to kill harmful microbes while preserving them. His discoveries fundamentally changed understanding of disease transmission and safety, laying the foundation for modern microbiology and improving public health worldwide.