New research: Second hand vaping is NOT harmless A recent study published on PubMed is raising serious concerns about the health effects of second hand exposure to e cigarettes. People exposed to second hand New analysis underscores health risks of e cigarettes THC CBD CANNABIS VAPE PODS E LIQUIDCannabis Oil with CBD and THC Cannaliz E cigarettes might harm lung tissue much like regular cigarettes do whether they contain nicotine or not a new study says.