Epidemiological and lab research eventually settled on vitamin E acetate, a common component of illicit cannabis vaping products, as the likely cause, even though a substantial minority of victims denied use of such products.
An open question, not addressed in Palamar’s study, is the extent to which school closures and social restrictions resulting from the COVID-19 pandemic affected these trends, and Monitoring the Future data won’t shed light on that for some time.
Drug use data came from unverified self-report, and the survey is conducted at participating schools, meaning that students “chronically absent or who dropped out are underrepresented,” he wrote.
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