Ayres J G
Thorax. 1986 Feb;41(2):111-6. doi: 10.1136/thx.41.2.111.
Weekly returns from the Royal College of General Practitioners research unit indicate that the attack rates for acute asthmatic episodes show a summer peak followed by an autumn peak in five out of the eight years studied, a summer peak alone in one year, and no discernible peak in two years. The autumn peaks coincide precisely with the rise in acute bronchitis attack rates, suggesting that autumnal asthma may be due to viral infections occurring against the background of bronchial hyperreactivity induced by summer pollen exposure. These data might also suggest that autumnal asthma is more likely to be diagnosed as acute bronchitis. Hay fever attack rates coincide with the rise in grass pollen counts, whereas the summer asthma peak is delayed by two to three weeks after the pollen peak.
英国皇家全科医师学院研究单位的每周报告显示，在所研究的八年中，有五年急性哮喘发作率呈现夏季高峰，随后是秋季高峰；一年仅有夏季高峰；两年则无明显高峰。秋季高峰与急性支气管炎发作率的上升恰好吻合，这表明秋季哮喘可能是由于夏季接触花粉导致支气管高反应性的背景下发生的病毒感染所致。这些数据还可能表明，秋季哮喘更有可能被诊断为急性支气管炎。花粉热发作率与草花粉计数的上升相一致，而夏季哮喘高峰则在花粉高峰后延迟两到三周出现。
