Ludwik Gross (September 11, 1904 – July 19, 1999) was a Polish-American virologist who discovered two different tumor viruses, murine leukemia virus and mouse polyomavirus, capable of causing cancers in laboratory mice.
Author: unknown (uploaded by user Furfur) Source: U.S. National Library of Medicine, The Ludwik Gross Papers Collection License: CC-PD-Mark PD US Government