Human fetal thymus and bone marrow contain target cells for natural killer cells.
D000375:Aging; D001853:Bone Marrow / Q000276:immunology*; D003602:Cytotoxicity, Immunologic; D005260:Female; D005333:Fetus / Q000276:immunology*; D006801:Humans; D007372:Interferons / Q000494:pharmacology; D011247:Pregnancy; D013601:T-Lymphocytes / Q000276:immunology; D013950:Thymus Gland / Q000276:immunology*
D007372:Interferons