Whether e-cigarette use precedes smoking or smoking precedes e-cigarette use is a critical question, but it is one which needs to be answered through longitudinal research. We need studies that follow the trajectory of teen tobacco/e-cigarette use over time. That is the only way to determine which comes first.

1. The Vickerman study

Electronic cigarettes are not a cure for nicotine addiction, they simply give smokers another optionopposedtoinhalingburning tobacco.

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