by Matt Richtel New York Times, posted 21 10 2019
A technology initially promoted to help cigarette smokers has transformed marijuana use, too. Now, with cases of severe lung illness rising, health investigators are warning people to stop vaping cannabis.
SAN FRANCISCO — For years, a divisive debate has raged in the United States over the health consequences of nicotine e-cigarettes. During the same time, vaping of a more contentious substance has been swiftly growing, with scant notice from public health officials.