Stop adding THC to e-cigarettes: US health authorities

Americans who use e-cigarettes should avoid adding substances like cannabis and buying products off the street -- or consider refraining altogether -- while authorities investigate hundreds of cases of severe lung disease among vapers, health officials said Friday.A total of 215 possible cases of pulmonary illness associated with vaping from 25 states are currently being probed, the Centers for Disease Control and Prevention (CDC) said in an update."CDC recommends that, while the investigation i