title: A comparative trial of influenza immunization by inhalation and hypojet methods.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002986:Clinical Trials as Topic; D006801:Humans; D007252:Influenza Vaccines / Q000008:administration & dosage* / Q000009:adverse effects; D007251:Influenza, Human / Q000453:epidemiology; D007277:Injections, Jet; D008297:Male; D008875:Middle Aged; D012138:Respiratory Therapy; D012140:Respiratory Tract Diseases / Q000453:epidemiology
chemical_list: D007252:Influenza Vaccines