Repeated infections with respiratory syncytial virus.
D000818:Animals; D000906:Antibodies; D000937:Antigen-Antibody Reactions; D000941:Antigens; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D009976:Orthomyxoviridae Infections / Q000276:immunology*; D012136:Respiratory Syncytial Viruses / Q000302:isolation & purification; D012141:Respiratory Tract Infections / Q000209:etiology / Q000276:immunology*; D012377:Rodentia; D012698:Serologic Tests; D014776:Virus Cultivation
D000906:Antibodies; D000941:Antigens