How is the nicotine delivered via e-cigs? Is it through absorbtion in the mouth tissues (like nicotine gum) or is it through actually inhaling into the lungs? I've been off cigarettes for over one & a half years after 50 years of smoking. I love vaping but have been fighting bronchitis for over a month and 3 kinds of antibiotics. I love vaping but am finding that I cough uncontrollably if I inhale. On the other hand, if I just hold the vapor in my mouth without inhaling, there is no coughing. I'm using zero nicotine or only 6 mg. of 50/50 pg-vg. I would really appreciate any comments ....