title: Analysis of antigenic drift in recently isolated influenza A (H1N1) viruses using monoclonal antibody preparations.
mesh_terms: D000818:Animals; D000914:Antibodies, Viral; D000956:Antigens, Viral / Q000235:genetics*; D000939:Epitopes; D005289:Ferrets / Q000276:immunology; D005787:Gene Frequency; D006389:Hemagglutinins, Viral / Q000235:genetics; D053118:Influenza A Virus, H1N1 Subtype; D009980:Influenza A virus / Q000235:genetics* / Q000276:immunology; D009439:Neuraminidase / Q000235:genetics
chemical_list: D000914:Antibodies, Viral; D000956:Antigens, Viral; D000939:Epitopes; D006389:Hemagglutinins, Viral; D009439:Neuraminidase