How was Julius Wagner-Jauregg awarded the Noble Prize in Physiology or Medicine?

Name: Julius Wagner-Jauregg.
Country: Austria.
Date of Birth: 7 March 1857.
Died: 27 September 1940.
Education: University of Vienna.
Subjects Of Study: Paresis shock therapy.
Known as: Malariotherapy.
Noble Prize Year: Nobel Prize for Peace in 1927, for his discovery of the therapeutic value of malaria inoculation in the treatment of dementia paralytica.