Dr. Rudolph (Rudolf) Emmerich (29 September 1856–15 November 1914) was a German bacteriologist noted for his advances against cholera and his co-invention of the first antibiotic drug Pyocyanase with Oscar Löw in 1890s. ^[1][2][3] Emmerich performed experiments on himself via injections of cholera strains and proved that cholera is less virulent when contracted from human to human as opposed to from the ground.^[1] Emmerich was a professor of Hygiene and Bacteriology at the University of Munich.^[1]