title: Antibody to swine influenza virus in serum and nasal secretions of volunteers over the age of 55 years.
mesh_terms: D000368:Aged; D000914:Antibodies, Viral / Q000032:analysis*; D005122:Exudates and Transudates / Q000276:immunology; D005260:Female; D006801:Humans; D007156:Immunologic Memory; D009980:Influenza A virus / Q000276:immunology*; D008297:Male; D008875:Middle Aged; D009297:Nasal Mucosa / Q000378:metabolism
chemical_list: D000914:Antibodies, Viral