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doi:10.26434/CHEMRXIV.10058168.V2 Ketene Acute Exposure Guideline Levels for Selected Airborne Chemicals NCBI Bookshelf

[5] For open wounds, apply antibacterial ointment instead to prevent infection
All aspects of vaping, such as the e-cigarette itself and the e-liquids used, are complex considerations that work best when designed by regulated companies who should be following safety standards when making the e-liquid

If the user knows what they are consuming

12 Four text-only control warnings used the US Surgeon Generals warning statements that have been required on the side of cigarette packs since 1985