title: Letter: Lymphocyte changes in viral infections.
mesh_terms: D001402:B-Lymphocytes / Q000276:immunology; D006801:Humans; D007958:Leukocyte Count; D008213:Lymphocyte Activation; D008231:Lymphopenia / Q000209:etiology; D009000:Monocytes / Q000276:immunology; D013601:T-Lymphocytes / Q000276:immunology; D014777:Virus Diseases / Q000097:blood*