Fig. 2From: Infection-mediated asthma: etiology, mechanisms and treatment options, with focus on Chlamydia pneumoniae and macrolidesAzithromycin improves asthma symptoms and patient quality of life. Subjects with severe refractory asthma treated with azithromycin (Open Label) had fewer persisting asthma symptoms a and greater asthma quality of life b than groups with lesser asthma severity randomized to azithromycin or to placebo [44]Back to article page