In a Humanosphere guest post, Katie Leach-Kemon, a policy translation specialist from the University of Washington’s Institute for Health Metrics and Evaluation (IHME), examines data from an IHME study published this week tracking smokers and cigarettes consumed from 1980 to 2012 and looks at smoking in China. “With all this focus on adult smoking and the lung cancer, heart disease, and chronic respiratory disease that smoking can lead to, it’s easy to forget about vulnerable bystanders, especially children. … Among children under five in China, secondhand smoke was the fifth-leading risk factor for early death and disability in 2010…” (1/9).