title: An oral prophylactic vaccine in recurrent bronchitis.
mesh_terms: D000284:Administration, Oral; D000293:Adolescent; D000328:Adult; D001428:Bacterial Vaccines / Q000008:administration & dosage*; D001991:Bronchitis / Q000517:prevention & control*; D002648:Child; D002986:Clinical Trials as Topic; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D014611:Vaccination
chemical_list: D001428:Bacterial Vaccines