cigarettes contain carbon monoxide do Why Are E-Cigarettes Safer Than Cigarettes Cigarette Tar | PMI Science
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Ignition Mechanism : Generates the necessary spark or arc to ignite the fuel

They have been credited with assisting in a decline in overall smoking rates

doi: 10.1093/infdis/jiw159 21 BradshawC

Human T-lymphotropic virus type 1 (HTLV-1) Generally asymptomatic, the chronic form of HTLV-1 can cause severe disease, including adult T-cell leukaemia/lymphoma (ATL) and a progressive nervous system condition known as HTLV-1-associated myelopathy or tropical spastic paraparesis (HAM/TSP)

This highlights a concerning correlation between substance use and headache frequency in this age group

(149.4mm)
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