Plain language summary of meta analysis of ecigs and disease available Stanton Glantz blog UMass study says e cigarettes with nicotine can help people quit smoking masslive.com While vaping is not risk free, it is less harmful than tobacco Our World in Data Evidence update on e cigarette dependence: A systematic review and meta analysis ScienceDirect There's no evidence e cigarettes are as harmful as smoking Science The Guardian New HRB evidence shows e cigarettes are associated with adolescents starting to smoke tobacco cigarettes HRB Health Research Board