18) described an iterative process through which they experimented with different nicotine ranges, https%3a%2f%25Evolv.E.L.U.Pc@haedongacademy.org as one (male, https://www.vapediy.de/boho-switch-basisger?t-500mah age 28) described, "‘Okay. As one person (female, age 21) described, "If I don’t just like the taste, https://www.vapediy.de/aspire-nautilus-prime-kit-starter-set I’m going to smoke a cigarette in a weird method, https://www.Vapepremium.de/lost-vape-ub-lite-coils-5er-pack as a result of it’s not satisfying. One interviewee (feminine, https://www.ezigaretteneinweg.de/hayvan-juice-nikotinsalz-liquid-para-yok-18mgml-10ml age 29) described closed system e-cigarettes as "kind of flimsy, like those that Marlboro keeps giving freely without cost at all of the bars." https%3a%2F%evolv.e.l.U.Pc Another interviewee (female, https://www.ezigaretteneinweg.de/510er-drip-tip-reewape-heatsink-slim age 29) noted, "I began, like a lot of people did, with whatever they had been promoting at Walgreens at the time.

Five interviewees described undesirable experiences with e-cigarette flavoring, which ranged from generally unpleasant results comparable to nausea after utilizing strawberries and cream (male, age 29, and female, age 20) and strawberries and honey (male, age 20) to extra severe effects equivalent to a burning sensation (female, age 23) and throat irritation (feminine, age 21) after using a cinnamon-flavored e-cigarette. Interviewees reported trying a large number of e-cigarette flavors, resembling tobacco flavoring and apple or tea flavorings.

Nearly all interviewees reported that their first use of e-cigarettes was with a closed-system product. Closed-system e-cigarettes, also known as "cigalikes," require users to dispose of the e-liquid cartridge and substitute it with a brand new, prefilled e-liquid cartridge. In addition to e-cigarette merchandise, amongst 83 patients who supplied information on combustible product use, forty three (52%) reported smoking combustible marijuana, and 20 (24%) reported smoking combustible tobacco.

To match survey respondents with EVALI patients, a subset of respondents with comparable characteristics to those of EVALI patients was chosen. Nearly all (96%) THC-containing merchandise reported have been packaged, prefilled cartridges, and 89% have been primarily acquired from informal sources (e.g., pals, family members, illicit sellers, or off the road).

Among 112 THC-containing merchandise for which the source was reported, one hundred (89%) have been acquired from informal sources (e.g., associates, family, school, sellers, or off the street).

The questionnaire requested detailed questions about e-cigarette use, together with the names of e-cigarette, or vaping, merchandise and units, frequency of use, and product sources in the three months preceding sickness onset.