Does vapour contain carbon monoxide?
No, e-cigarette vapor does not contain carbon monoxide (CO) because this gas is the exclusive product of incomplete combustion, which is absent during vaporization. Unlike a tobacco cigarette that burns at over 800°C, vaping heats the e-liquid at a low temperature to change its physical state without breaking chemical bonds in a chaotic manner.
Carbon monoxide is born from oxygen deprivation during an actual fire or classic combustion, whereas vaping is a clean and controlled thermodynamic process. As long as your coil isn't literally catching fire due to an absurd setting, you avoid this asphyxiating gas that typically saturates a smoker's hemoglobin. This is one of the fundamental differences that radically separates the world of smoke from the world of vapor.