The main study finding was as follows: "The assessment of lung function demonstrated that neither a brief session of active e-cigarette smoking nor a 1 hour passive e-cigarette smoking session significantly interfered with normal lung function. On the other hand, acute active and passive tobacco cigarette smoking undermined lung function, as repeatedly shown in previous studies."

One possible answer appears in Wride's column. She writes:

Experienced vapers will tell you that different e-liquids taste different depending on the temperature of the heating element. You cannot get a consistent taste if the voltage of the heating element is not consistent. If it is too hot, you can burn the e-liquid, and it tastes awful. If the element burns too cold, it will not provide the vapor you want.

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