title: Atypical mononuclear cells in the blood.
mesh_terms: D000921:Antibody-Producing Cells; D001773:Blood Cells; D006801:Humans; D008214:Lymphocytes / Q000276:immunology; D008221:Lymphoid Tissue / Q000166:cytology; D014777:Virus Diseases / Q000097:blood / Q000276:immunology