CVS Health Chief Medical Officer on rising e-cigarette concerns

Amid rising concerns of e-cigarette use among young adults, CVS Health announced plans to invest $50 million on this issue. However, this is not CVS Health's first major move, it was actually among the first to ban all tobacco products five years ago. Dr. Troy Brennan, CVS Health Chief Medical Officer, joins Yahoo Finance's YFi AM to discuss that and more.