The nicotine market is rapidly evolving due to e-cigarettes. Although e-cigarettes may help some smokers to quit, an increasing number of non-smokers are trying these products. On this weeks Routine Checkup the fellas speak with Dr. David Hammond, Professor in the School of Public Health & Health Systems at the University of Waterloo all about the evolving patterns of youth vaping and how e-cigarettes are having an effect on its users across Canada.