Problems in developing a respiratory vaccine.
D000336:Aerosols; D000906:Antibodies / Q000032:analysis; D000917:Antibody Formation; D006801:Humans; D012141:Respiratory Tract Infections / Q000517:prevention & control*; D014611:Vaccination; D014765:Viral Vaccines / Q000008:administration & dosage*; D014777:Virus Diseases / Q000517:prevention & control*; D014780:Viruses / Q000276:immunology
D000336:Aerosols; D000906:Antibodies; D014765:Viral Vaccines