[Role of viral infections in asthmatic crisis].
D000208:Acute Disease; D001249:Asthma / Q000188:drug therapy / Q000473:pathology* / Q000821:virology*; D002648:Child; D006801:Humans; D012141:Respiratory Tract Infections / Q000150:complications* / Q000821:virology*; D014777:Virus Diseases / Q000150:complications*