Must have been a man to make this rule
According to the USPS: Hemp and hemp-based products, including cannabidiol (CBD) with the tetrahydrocannabinol (THC) concentration of such hemp (or its derivatives) not exceeding a 0.3 percent limit are permitted to be mailed in domestic mail only when: The mailer complies with all applicable federal, state, and local laws, and plans approved by the USDA under 7 CFR Part 990 pertaining to hemp production, processing, distribution, and sales
Vaping offers more control over nicotine strength, flavor, and vapor production
Previous attempts at exploring this relationship have tested for the harmful qualities of BaP on mice
But if they cannot quit smoking combustible cigarettes, they should consider using novel nicotine products to either quit smoking altogether or to reduce their harm by transitioning fully to these products. Going forward, work needs to be done to better understand the non-cancer risks associated with e-cigarettes, such as respiratory and cardiovascular disease