School bathrooms and locker rooms, for example, have low to no supervision and are currently hotspots for vaping in schools
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doi: 10.1001/jamapediatrics.2018.3811

And according to a 2021 report into vaping from PHE: Smoking prevalence (including those who smoked sometimes or more than once a week) in March 2020 was 6.7% (compared with 6.3% in March 2019) and has changed little since 2015 when it was 7.1% There was little change in levels of vaping over the last few years with current vaping (at least once per month) prevalence being 4.8% in March 2020, the same as in March 2019 Smoking prevalence is at 6.2% (defined as smoking more than 100 cigarettes in their life and having smoked in the past 30 days) Current vaping prevalence is at 7.7% (defined as vaping on more than 10 days in their lifetime and having vaped in the past 30 days) Based on the socioeconomic status of 11 to 18 year olds, the estimates for smoking and vaping prevalence were higher among more advantaged groups in social grades A, B and C1 (7.1% for smoking, 5.3% for vaping) than for more disadvantaged groups in social grades C2, D and E (5.7% for smoking, 3.5% for vaping)

Even though a nicotine-free vape doesnt contain any significant amount of nicotine, there are still some substantial risks involved in using one and possibly painful or dangerous side effects
Director Peter Watkins-Hughes said: At the moment, we are renewing the seats at the cinema for the first time since 1934, so we believe thats when these cigarettes must have been left there