No safe level exists for smoking
Sun X, Wang LF, Feng Y, Xie H, Zheng XY, He A, Karim MR, Lv ZY, Wu ZD (2016) A case report: a rare case of infant gastrointestinal canthariasis caused by larvae of Lasioderma serricorne (Fabricius, 1792) (Coleoptera: Anobiidae)
In 2019, an outbreak of e-cigarette or vaping product use-associated lung injury (EVALI) hospitalised thousands of people, though this was primarily linked to illicit THC/cannabis products containing vitamin E acetate, not regulated nicotine vapes
Use clear bags: Even if you aren't required to, placing your disposables in a clear plastic bag helps with organization and contains leaks