Exposure to secondhand aerosol from electronic cigarettes at homes: A real-life study in four European countries.

Introduction:
This text discusses a study on exposure to secondhand aerosol from electronic cigarettes (SHA) in private homes. The study aimed to comprehensively characterize environmental and individual exposure to SHA in real-life conditions at homes.

Key Points:

* The study was an observational study conducted in four European countries.
* Airborne nicotine, particulate matter (PM), and biomarkers were measured in e-cigarette users' homes and control homes.
* The study found that airborne nicotine and PM concentrations did not differ according to different e-cigarette use characteristics.
* Non-users residing with e-cigarette users had higher levels of nicotine metabolites, 1,2-propanediol, and cobalt in their saliva and urine than non-users living in control homes.
* The study suggests that SHA exposure from e-cigarette use at home might have potential health implications for bystanders.
* Further studies are needed to assess the implications of SHA exposure for smoke-free policy.

Main Message:
The study highlights the potential health risks of SHA exposure from e-cigarette use at home for bystanders. The presence of nicotine metabolites, 1,2-propanediol, and cobalt in the saliva and urine of non-users residing with e-cigarette users indicates that SHA exposure is a concern. Further studies are needed to guide smoke-free policy in private settings. Overall, the study underscores the need for public education and awareness about the potential health risks of SHA exposure from e-cigarette use at home.

Amalia B, Fu M, Tigova O, et al. Exposure to secondhand aerosol from electronic cigarettes at homes: A real-life study in four European countries. The Science of the total environment. Published online September 10, 2022:158668. doi:10.1016/j.scitotenv.2022.158668