To demonstrate experimentally that a microscopic organism actually is the cause of a disease and the agent of contagion, I know no other way, in the present state of Science, than to subject the microbe (the new and happy term introduced by M. Sédillot) to the method of cultivation out of the body.
Louis PasteurOne does not ask of one who suffers: What is your country and what is your religion? One merely says: You suffer, that is enough for me.
Louis Pasteur