Secondhand smoke exposure is a cause of premature death and disease among women and children.
Tobacco smoke contains more than 4,000 chemicals, 60 of which are known or suspected carcinogens.
In the 21st century, there will be an estimated 1 billion tobacco deaths.
Research offers hope for newborns in the developing world.
Epidemiologist Chris Beyrer wields data and scientific rigor in defense of human rights
Peter Agre sets his sights on a new challenge—malaria