E cigarettes New HRB evidence shows e cigarettes are associated with adolescents starting to smoke tobacco cigarettes HRB Health Research Board That big claim that vaping leads to smoking may be based on insubstantial evidence More evidence that e cigs expanding nicotine addiction Stanton Glantz blog While vaping is not risk free, it is less harmful than tobacco Our World in Data UMass study says e cigarettes with nicotine can help people quit smoking masslive.com