https://www.wired.com/story/vaping-may-have-killed-someone/

Sometime between Wednesday and Friday, an Illinois resident died of an unknown respiratory illness that may have been the result of vaping. The death was one of nearly 200 cases of mysterious respiratory problems across 22 states whose only known link is the recent use of electronic cigarettes, or vapes, according to the Centers for Disease Control and Prevention.

The CDC, a federal agency, is now working with state health agencies and the Food and Drug Administration to try and find the cause, part of an investigation launched in mid-August after dozens of people, mostly teenagers and young adults, started showing up in hospitals reporting symptoms including difficulty breathing, fatigue, weight loss, and chest pain. That population has increased to 193 cases, all of whom had vaped in the month prior to their illness. Some were smoking nicotine, others THC or cannabinoids. The victims used different products, and no one ingredient stood out as a potential culprit.