title: Nasal influenza vaccine enters Phase I clinical trial.
mesh_terms: D000281:Administration, Intranasal; D017321:Clinical Trials, Phase I as Topic; D006801:Humans; D007252:Influenza Vaccines / Q000008:administration & dosage* / Q000009:adverse effects / Q000276:immunology; D008297:Male; D014613:Vaccines, Attenuated / Q000008:administration & dosage / Q000009:adverse effects / Q000276:immunology
chemical_list: D007252:Influenza Vaccines; D014613:Vaccines, Attenuated