Before 20th century, doctors in Europe and the United States dressed like a gentleman wearing a high hat, wearing a gray robe through the early hospital, a dark one! Is it a little scary?
At the time, the concept of modern microbiology and disinfection had not yet been established, and doctors were dressed entirely to "protect themselves"-to avoid stains, dust and other contaminated robes-the grey robes that could make the stain as visible as possible.
Later known as the "Father of microbes," the Frenchman-Pasteur, who had 5 children, only two lived to adulthood and another 3 died of typhoid fever, prompted him to start studying the infection. He found that bacteria are the cause and medium of various infectious diseases, and high temperatures can kill microorganisms that make them bitter, and eventually invent "pasteurization", which is quickly used in food and beverages.
Pasteur also realized that microbes can cause disease, and thus created a germ theory. Until 1865, when British doctor Joseph Leester was a professor at the University of Glasgow, a professor of chemistry inspired him to refer to Pasteur's results to solve the problem of surgical infection. So Liszt suggested that lack of disinfection was the main cause of postoperative infection. On August 12, he chose Carbolic as disinfectant for a patient with a broken leg and implemented a series of improvements, including a doctor wearing a white coat, an operating apparatus to be treated with high temperature, a doctor and a nurse having to wash hands before the operation, and a patient's wound to be bandaged after disinfection. This series of measures immediately reduced the probability of postoperative infection, greatly improving the success rate of surgery. Since then, the white coat replaced the grey robe, gradually became the doctor's formal overalls.