Improvements in air quality over the past 20 years in southern California have been linked to a significant drop in bronchitic symptoms in children with and without asthma, an observational study in JAMA reports. The prevalence of bronchitic symptoms fell by about 32% in children with asthma and by about 21% in those without asthma. ...
Better air quality has an impact on respiratory symptoms: study
18 Apr 2016