title: Reuben Leon Kahn
text: # Reuben Leon Kahn
  
  Reuben Leon Kahn (July 26, 1887 in Kovno, Russian Empire – July 22, 1979 in Miami) was an American immunologist.
  
  He is best known for his investigations of blood reactions, like the Kahn test, an efficient test for syphilis.
  
  