title: Viruses and asthma exacerbations.
authors: N G
authors: NG
authors: Papadopoulos
authors: S L
authors: SL
authors: Johnston
mesh_terms: D000328:Adult; D001249:Asthma / Q000821:virology*; D002648:Child; D006801:Humans; D012141:Respiratory Tract Infections / Q000150:complications* / Q000175:diagnosis; D014777:Virus Diseases / Q000150:complications* / Q000175:diagnosis