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For a 3mg cigarette, it has a strong swallowing effect

Nicotine acts on the nervous system by mimicking acetylcholine, a neurotransmitter

33 Polychlorinated biphenyls (PCBs): This synthetic compound, widely used in electrical equipment in the past, was banned at the end of the 1970s in many countries because of environmental concerns

One study in China reported a low prevalence of past 30-day use of 1.2%, though the study was undertaken in middle-school students instead of high-school students, which could have underestimated teenage e-cigarette use 21

The fact that it comes on at all, even momentarily, means that the socket is getting power, at least some of the time