As far as I have heard and read the vaping products linked to these illnesses/deaths were proven to be off-brand or "black-market" vaping products
Each test has different guidelines on how long a person should fast beforehand
Table 3 [i] Model 1: unadjusted
The Draft Guidance includes no accounting of the impacts of the dominant illicit market that serves users of all ages with unregulated flavored vaping products
The report covers various aspects, ranging from a broad market overview to intricate details like unit operations, raw material and utility requirements, infrastructure necessities, machinery requirements, manpower needs, packaging and transportation requirements, and more
3 In such rooms, a false alarm caused by e-cigarettes is highly unlikely