The Nazi regime charged physicians and biologists with protecting health of the "people's body" [Volkskörper]. Their research and practical work was supposed to be completely adapted to the eugenic demands of National Socialist demographic and racial policy. Among other activities, they participated in the search for definitive racial definitions, and in the drafting and implementation of racial hygiene laws, as in the case of forced sterilizations and euthanasia programs. The photo shows laboratory workers in Hamburg’s Institute for Hygiene, where more than fifty children deemed "unworthy of life" were killed in the children's hospital.