Vaping study: Mayo Clinic researchers find lung injuries caused by toxic chemical fumes

The numbers seem to be growing by the day. According to the Center for Disease Control and Prevention, there have now been 18 deaths linked to vaping here in the U.S., with more than a thousand cases reported in 48 states. Seven of those cases are right here in Arizona. Now, researchers at the Mayo Clinic are trying to get to the bottom of what's causing it — and they may be close to figuring it out.

Marijuana vape sales lag as lung illnesses rise in US

​​​​​​​Vaping products, one of the fastest-growing segments of the legal marijuana industry, have taken a hit from consumers as public health experts scramble to determine what’s causing a mysterious and sometimes fatal lung disease among people who use e-cigarettes.