How was Robert Koch awarded the Nobel Prize in Physiology or Medicine?

Name: Robert Koch.
Country: Germany.
Date of Birth: 11 December 1843.
Died: 27 May 1910.
Education: University of Göttingen.
Subjects Of Study: Bacillus anthracis, Vibrio cholera, Bacteria cholera, Tuberculosis.
Known as: Koch’s postulates, Koch–Pasteur rivalry, Bacterial culture method, Germ theory of disease, Medical microbiology, Discovery of the anthrax bacillus, Discovery of tuberculosis bacillus and tuberculin, Discovery of cholera bacillus.
Noble Prize Year: Nobel Prize for Peace in 1905, for his investigations and discoveries in relation to tuberculosis.