The article implies that the problem seems to be caused not necessarily vaping as such, but by two things:

1) vaping things that really should not be vaped, resulting in oil droplets getting in your lungs. e.g. "cannabidiol oil, which is not designed for vaping but has been used that way." Apparently some vaping fluids are much worse than others, thus the recommendation to "stop buying bootleg and street cannabis and e-cigarette products, and to stop modifying devices to vape adulterated substances."

2) people not seeking timely medical attention and lying about the causes, as marijuana possession is still a crime where they live.