vintage pipe stand and tobacco jar Wood 6 Holder Glass Humidor C W Products NY, USA Vintage Mid Century Solid Wood

While not without some risk, when compared to smoking e-cigarettes are far less harmful

Although the full mechanisms of tolerance induced by AIT have not yet been elucidated, the increase in regulatory populations, such as regulatory T and B cells, and the production of cytokines with immunoregulatory properties reduce type 2 (T2) responses and shift toward the production of antigen-specific protective antibodies, especially IgG4 [340, 341]

Why would it allow something as definitely addictive, probably lethal and (by the way) visually repulsive as chewing tobacco

Joe once spent a weekend nursing what looked like a broken foot