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August von Wassermann

August Paul von Wassermann (21 February 1866 - 16 March 1925) was the German bacteriologist who developed a complement fixation test for the diagnosis of syphilis in 1906, just one year after the causative organism had been identified.

The Wassermann test remains a staple of syphilis detection and prevention in some areas, although it has often been replaced by more modern alternatives.