To be clear, the CDC has not yet confirmed whether pulmonary conditions in patients actually cause vaping. Investigators looking for cases have not yet found a common link, except for the fact that patients vape. Some of them admitted using tetrahydrocannabinol or THC, which causes "high" in marijuana, and American Vaping Association president Gregory Conley has reportedly been confident that the diseases are caused by devices containing cannabis .
CDC official Ileana Arias stated, however, "[m] ore information is needed to determine the cause of these diseases." Authorities are investigating several theories, including the possibility that diseases are caused by toxic substances such as heavy metals, such as lead, or specific flavors. Lung injuries that doctors see are consistent with chemical inhalation injuries, after all, and the FDA has no control over the ingredients used by manufacturers.
FDA Center for Tobacco Products director Mitch Zeller said the agency is now testing products to determine if they contain harmful substances. Its findings can only help if illnesses are actually triggered by substances in commercial products, though. See you're here, another theory is that people empty commercial nicotine pods and fill them with the concrete of their own containing different chemicals, including oils THC.
Zeller says that different government agencies use a lot of resources to investigate the problem, seeing it grow as the days go by. The number of cases has more than doubled in the past week, and patients present with extensive, even permanent, lung injury requiring days on a fan. Before their situation became serious, patients reported a gradual onset of symptoms that included difficulty breathing, vomiting, nausea, chest pain and fatigue.