Born in Bamberg , with Jewish origins , he studied at several universities throughout Germany , and in 1890 began to work under Robert Koch at the Institute for Infectious Diseases at the Charité in Berlin .
Born in Bamberg , with Jewish origins , he studied at several universities throughout Germany , receiving his medical doctorate in 1888 from the University of Strassburg . 
 In 1890 began work under Robert Koch at the Institute for Infectious Diseases at the Charité in Berlin .