Giving RSV vaccine intranasally.
D000281:Administration, Intranasal; D002675:Child, Preschool; D006801:Humans; D012136:Respiratory Syncytial Viruses / Q000276:immunology*; D010253:Respirovirus Infections / Q000517:prevention & control*; D014765:Viral Vaccines / Q000008:administration & dosage*
D014765:Viral Vaccines