title: Standardization of a rapid modified micro-neuraminidase-inhibition test (Essen-NIT) for influenza virus-neuraminidase antibody assay and comparison with the W.H.O. method.
mesh_terms: D000914:Antibodies, Viral / Q000032:analysis*; D006801:Humans; D007158:Immunologic Techniques / Q000592:standards*; D009980:Influenza A virus / Q000276:immunology*; D009439:Neuraminidase / Q000276:immunology; D009975:Orthomyxoviridae / Q000276:immunology*
chemical_list: D000914:Antibodies, Viral; D009439:Neuraminidase