first e cigarette invented Hon Lik the e-cigarette to quit smoking – but now he's a dual user | Vaping Hon Lik - Wikipedia

Smoking can contribute to chronic low-grade inflammation in the body and can cause overactivation of the immune system

Is there a safe level of nicotine use for digestive health

Kornegay, the Institutes current president and a former Democratic congressman from North Carolina, who until the previous year had had a seat on the House Interstate and Foreign Commerce Committee, and Jack Mills, former executive director of the Republican Congressional Campaign Committee

However, the observed associations between vaping and subsequent cigarette smoking do not necessarily indicate a causal "gateway effect", as shared social, behavioral, or genetic risk factors may contribute to both behaviors