CO comes from incomplete combustion and you’d usually only have detectors for it around gas heaters, generators, stuff like that. Maybe you meant carbon dioxide (CO2). I don’t remember ever seeing one around a voting booth. I’d consider them a good idea though, not because CO2 poisoning is a serious concern per se, but because high CO2 means that you’re breathing air that other people exhaled, increasing your exposure to airborne pathogens.
CO comes from incomplete combustion and you’d usually only have detectors for it around gas heaters, generators, stuff like that. Maybe you meant carbon dioxide (CO2). I don’t remember ever seeing one around a voting booth. I’d consider them a good idea though, not because CO2 poisoning is a serious concern per se, but because high CO2 means that you’re breathing air that other people exhaled, increasing your exposure to airborne pathogens.