People are vaping THC. Lung injuries being reported nationwide. Why is the CDC staying quiet?

Federal health officials are under fire for their unclear public warnings following one death and nearly 200 cases of vaping-related lung illnesses, which some say are related to the far riskier practice of vaping marijuana oil rather than nicotine.

HIGHLIGHTS

• Some state health department and news reports suggest many of the cases of lung problems involve tetrahydrocannabinol, known as THC.
• Based on what we know, there’s enough to tell people: Don’t vape THC oils — especially products bought off the street.
• Marijuana oil vaping was cited in at least 21 cases of severe lung illness reported by the San Francisco Chronicle last week

Read more in USA Today