The side effects of vaping usually differ from persons to persons, as a result of the difference in reaction to the components that make up e-liquids. They could also be a result of frequency and manner of vaping. Succinctly, vaping’s side effects are most often incidental.
Counterfeit products as a general rule are products manufactured clandestinely as an exact imitation of an original product in order to deceive or defraud for profit. Counterfeit products are not made with the same diligence as the original manufacturers do, the quality of materials or substances is lower and so is the outcome.