There have been some studies, and this is also our experience, that for some people the ritual of smoking, the blowing out of some vapour, is very important for them.
Yesterday I had a patient who had a cerebral haemorrhage. She had neurosurgical surgery. She walks with a cane. She wants to stop smoking to preserve the integrity of her vessels and she doesn't want to use the electronic cigarette with nicotine. But in the past she already bought the e-cigarette without nicotine and it was helpful in her case. So along with nicotine replacement therapy she wants to use the electronic cigarette without nicotine. There have been some publications, and I don't have the reference offhand, showing that the ritual of smoking is also very important for people...to vape or to smoke.
As long as the flavours are innocuous also.... This is one thing. We don't have much information about the flavours. But they need to be there because this is what makes the e-cigarette appealing and usable. We have to have some control over this to make sure that the flavours are not dangerous.