yeah its all about regulation, heres a statement from the MN department of health https://www.health.state.mn.us/news/pressrel/2019/lunginjuryfaq.pdf
Q. What about products from Minnesota's medical cannabis program?
While the available evidence from the investigation connects the lung injuries with use of illegal THC products and not products solely from medical cannabis programs, MDH cannot give complete assurance of safety until investigators determine a specific cause of the lung injuries. It is important to note that all medical cannabis products sold by Minnesota's two medical cannabis manufacturers must be compliant with state testing standards to ensure they do not contain contaminants. Also, Minnesota's medical cannabis program has surveyed patients about side effects since the beginning of the program. About 20 percent of patients have reported side effects, typically including dry mouth, drowsiness, fatigue or mental clouding. Very few reported lung issues.