title: [Antibody level against Legionella pneumophila type I of the healthy population in Beijing in 1985].
mesh_terms: D000328:Adult; D000367:Age Factors; D000907:Antibodies, Bacterial / Q000032:analysis*; D002681:China; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D006801:Humans; D007875:Legionella / Q000276:immunology*; D008297:Male; D008875:Middle Aged
chemical_list: D000907:Antibodies, Bacterial