Microbiology is born.
Marcel M rieux joins the Institut Pasteur as assistant to Professor Emile Roux and works alongside Pasteur. Strongly influenced by Pasteur's teachings, M rieux establishes the Institut Biologique M rieux, a laboratory for medical, bacteriological and chemical analysis, and later a production laboratory. The Connaught Laboratories are created. Industrial virology is born. It will later be used in human medicine.