Fig. 6From: Epidemiology of asthma exacerbation in children before and after the COVID-19 pandemic: a retrospective study in Chengdu, ChinaAnnual average temperature (gold bars), relative humidity (percentages, green bars) and air quality index (gold line) in Chengdu during the observation period. Data were extracted from the public database of the Chengdu Meteorological BureauBack to article page