Respiratory syncytial virus.
D001049:Apnea / Q000150:complications; D001249:Asthma / Q000209:etiology; D001990:Bronchiolitis, Viral / Q000150:complications / Q000453:epidemiology; D002648:Child; D002675:Child, Preschool; D003428:Cross Infection / Q000150:complications; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007232:Infant, Newborn, Diseases; D010102:Oxygen Inhalation Therapy; D011024:Pneumonia, Viral / Q000150:complications; D012136:Respiratory Syncytial Viruses / Q000472:pathogenicity; D010253:Respirovirus Infections / Q000150:complications / Q000453:epidemiology*