BACKGROUND: Cough is one of common symptoms of @entity683 , the cough duration and prevalence of @entity16700 after @entity1729 has not been well described. OBJECTIVES: We aim to investigate the duration of cough and prevalence of @entity16700 ( @entity16700 ) and its relation with acute symptoms, @entity32 , and cough sensitivity in @entity1 with @entity683 . METHODS: @entity1 with acute symptoms of @entity683 were enrolled and followed up until cough relived. Spirometry, induced sputum test, @entity2951 challenge test were conducted in @entity1 with @entity16700 . Cough sensitivity was presented as logarithm of provocative concentration inducing 5 or more coughs (logC5) Results: A total of 141 cases with @entity683 were enrolled. In @entity1 with @entity683 , 97.2% of them complained cough. The duration of cough was as following: <1 week (73.0%); 1-2 weeks (7.8%); 2-3 weeks (7.8%); >= 3 weeks(8.5%). Twelve (8.5%) @entity1 had cough lasting more than 3 weeks ( @entity16700 ), 4(2.8%) @entity1 developed chronic cough (>8 weeks). Acute symptoms, spirometry, bronchial responsiveness and sputum differential cell count were similar between @entity1 with @entity16700 and those without @entity16700 , however, there was a higher prevalence of previous @entity16700 (58.3% vs 14.7%, p<0.05) and elevated cough sensitivity (lgC5: 1.18  0.58 vs 2.73  0.33, p<0.01) in @entity1 with @entity16700 as compared with the @entity1 without @entity16700 . CONCLUSIONS: @entity697 is common in @entity1 with H1N1 @entity16700 , only a few of @entity1 develop chronic cough. Acute symptoms cannot predict @entity16700 . which is related with previous @entity16700 and increased cough sensitivity. This article is protected by copyright. All rights reserved.

The duration of cough in @entity1 with XXXX .

@entity1 :: ('9606', 'Species') :: ['Patients', 'patients'] @entity32 :: ('MESH:D007249', 'Disease') :: ['airway inflammation'] @entity697 :: ('MESH:D000208', 'Disease') :: ['Acute cough'] @entity2951 :: ('MESH:D002211', 'Chemical') :: ['capsaicin'] @entity683 :: ('MESH:D007251', 'Disease') :: ['influenza', 'H1N1 influenza'] @entity16700 :: ('MESH:D003371', 'Disease') :: ['PIC', 'postinfectious cough'] @entity1729 :: ('MESH:D012141', 'Disease') :: ['viral upper respiratory tract infection']
@entity683 :: (MESH:D007251,Disease) :: ['H1N1 influenza']
