Such a study “proves” nothing. Some people (Rush Limbaugh, Bob Dole) quit easily. Others have to gind what works (patch, hypnosis, nicotine gum, vaping). The people in the control group are different than the people in the vaping group. The talk show hostess Vicki McKenna quit smoking through vaping. I am not sure why allthe movement against it. Years ago, there Was a product called aquafilter that attached to cigarettes to wean people off. No one had a problem with that. Nicotine gum also works on a similar principle, and few had a problem with that. For some, going through the motions with the hands is part of the experience hardest to shed. Vaping allows gou to keep that.
“I am not sure why allthe movement against it.”
In the state of Maryland, I believe the tax on cigarettes is over 20%. Tax on e-cigs and vaping supplies is 6%. That may have something to do with it.
Liberals will go their graves condemning e-cigs as causing people to smoke but denying that marijuana is a gateway drug.