title: [Epidemiologic diagnostic value of negative serums and low CBR titer values in the diagnosis of influenza].
mesh_terms: D000367:Age Factors; D000906:Antibodies / Q000032:analysis; D003168:Complement Fixation Tests; D003937:Diagnosis, Differential; D004196:Disease Outbreaks / Q000175:diagnosis*; D005859:Germany, East; D006801:Humans; D007106:Immune Sera; D007251:Influenza, Human / Q000175:diagnosis* / Q000276:immunology; D009975:Orthomyxoviridae / Q000276:immunology; D010222:Parainfluenza Virus 1, Human / Q000276:immunology; D011379:Prognosis; D012189:Retrospective Studies
chemical_list: D000906:Antibodies; D007106:Immune Sera
vernacular_title: Epidemiologischer Aussagewert von Negativseren und niedrigen KBR-Titerwerten in der Grippediagnostik.