A 15-year study finds indoor smoking bans really do make kids with asthma healthier (Business Insider)

"This study shows that even those short exposures to secondhand smoke in public spaces like restaurants can have a significant impact on asthma exacerbations," University of Chicago immunologist Dr. Christina Ciaccio said in a statement.
http://www.businessinsider.com/indoor-smoking-bans-kids-asthma-healthier-2016-12