As a new year begins, schools and parents are grappling with a price increase for EpiPens — recommended by Congress for all schools and many public places. It's used against life-threatening allergic reactions that happen fast. One EpiPen cost $57 when the company Mylan took over the product. Now it's only selling it two at a time and charging $600. Cynthia Koons, healthcare reporter for Bloomberg News, says there are a lot of dynamics at work.