title: Bacterial vaccine in childhood asthma. A double-blind study.
mesh_terms: D001249:Asthma / Q000175:diagnosis / Q000188:drug therapy* / Q000209:etiology; D001428:Bacterial Vaccines / Q000627:therapeutic use*; D002675:Child, Preschool; D002986:Clinical Trials as Topic; D004200:Diseases in Twins; D004804:Eosinophils; D006801:Humans; D008826:Microbial Sensitivity Tests; D010919:Placebos; D012141:Respiratory Tract Infections / Q000150:complications*; D012882:Skin Tests
chemical_list: D001428:Bacterial Vaccines; D010919:Placebos