Fraenkel's later life was marred by Adolf Hitler's rise to power in Germany. He was stripped of his position as professor at Heidelberg in 1933 and his license to practice medicine was revoked in 1938, three months before his death.
References
Peter Drings, Jörg Thierfelder, Bernd Weidemann, Friedrich Willig (Hrsg.), Michael Ehmann (Mitarbeit), Albert Fraenkel - Ein Arztleben in Licht und Schatten 1864-1938, ecomed Verlagsgesellschaft, Landsberg, 2004