mental effects of smoking tobacco harms not just your physical health, but your health too Tobacco Addiction Guide: Symptoms, Risks

On the vaping side, puffing behaviors make a big difference

Since TLR4 deficiency eliminated tissue penetration and ROS production in systemic tissues and reduced the PM 2.5 influence on boosting peripheral Ly6C high cells (F4/80 + , CD11b + , and CD115 + ), it appears that these pathways play a role in mediating the effects of exposure (153)

See also p.24 of the report: Burning Issues: The Global State of Tobacco Harm Reduction 2020 Tobacco Smoking Prevalence - Burning Issues: The Global State of Tobacco Harm Reduction 2020 Historically, most countries have seen a rise and then a decline in smoking

In 2002, ASTM Standard E2187 [10] was released following NIST suggested procedures [11]