Table 1.

Patient demographics, smoking, and vaping history

Case Number	1	2	3
Age	50	33	35
Gender	Female	Male	Male
Race	White	White	African American
Marital status	Single	Single	Single
Employment status	Unemployed	Full-time	Unemployed
Smoking history	Former smoker, about 35PY, quit 4 months ago and started E-cigarettes; no marijuana.	Never smoker; no marijuana.	Former smoker, about 0.25pack/day, quit 1.5 years ago; smokes marijuana daily since then.
Length of vaping history	4 months	2 years	One episode of vaping 2 months before admission, with dyspnea thereafter
Product	Unknown	THC	Marijuana
Last day of vaping	Unknown	One day prior to admission	The day before admission
Brand	Unknown	Changed supplier recently	Unknown

Table 2. All three patients were relatively young (age < 50), of mixed gender (2/3 male, 1/3 female), and mixed race (2/3 Caucasian, 1/3 African American). All had a prior vaping history utilizing non-THC and THC-containing products for a range of 4 months to 2 years. The onset of the symptoms consistently occurred following the vaping of products of unknown origin purchased illicitly. Abbreviations: PY – pack years; THC – tetrahydrocannabinol.