Answer: The discovery of the hyperlink among germs and diseases.
Explanation: The extra formal experiments on the connection among germ and ailment had been carried out via way of means of Louis Pasteur among the years 1860 and 1864. He located the pathology of the puerperal fever and the pyogenic vibrio withinside the blood, and recommended the usage of boric acid to kill those microorganisms earlier than and after confinement.