People should stop using e-cigarettes, especially those with marijuana ingredient tetrahydrocannabinol (THC), U.S. public health officials recommended on Friday, as an investigation into illnesses and deaths related to vaping deepens. E-cigarettes have been marketed as tools to help smokers quit, but rising use among youth in the United States and a spate of severe lung illnesses tied to the devices have triggered a backlash and … Continue reading U.S. CDC recommends against using vapes with marijuana ingredient