title: Role of viral infection and host factors in acute episodes of asthma and chronic bronchitis.
mesh_terms: D001249:Asthma / Q000175:diagnosis / Q000209:etiology / Q000276:immunology / Q000382:microbiology*; D001991:Bronchitis / Q000175:diagnosis / Q000209:etiology / Q000276:immunology / Q000382:microbiology*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008297:Male; D012136:Respiratory Syncytial Viruses / Q000302:isolation & purification; D012141:Respiratory Tract Infections / Q000150:complications* / Q000276:immunology; D018108:Respirovirus / Q000302:isolation & purification; D012229:Rhinovirus / Q000302:isolation & purification; D014777:Virus Diseases / Q000150:complications* / Q000175:diagnosis / Q000382:microbiology