Parainfluenza virus infections.
D000914:Antibodies, Viral; D000917:Antibody Formation; D002675:Child, Preschool; D003440:Croup / Q000276:immunology / Q000382:microbiology; D006801:Humans; D007074:Immunoglobulin G; D007223:Infant; D012141:Respiratory Tract Infections / Q000276:immunology / Q000382:microbiology*; D018108:Respirovirus / Q000276:immunology; D014613:Vaccines, Attenuated / Q000627:therapeutic use; D014765:Viral Vaccines / Q000627:therapeutic use
D000914:Antibodies, Viral; D007074:Immunoglobulin G; D014613:Vaccines, Attenuated; D014765:Viral Vaccines