Independent research, in contrast to PMI data, showed that particle emissions in indoor spaces do not return to baseline values soon after IQOS use termination, indicating that IQOS is an indoor air pollutant.46 80 86 However, both data sources agreed that IQOS is a lesser indoor air pollutant compared with other sources of emissions like cigarettes, waterpipe, e-cigarettes, other HTPs, incense or mosquito coils.84 89 90 Nevertheless, both sources showed emission levels higher than background levels of some constituents (eg, PM and acetaldehyde) that could negatively impact bystanders health in the long term, urging independent researchers to call for restricting indoor IQOS use.93 Notably, in contrast to Accord, an HTP previously marketed by PMI, IQOS has been marketed as a safer alternative to cigarettes with reduced risk claims,17 although IQOS increased users exposure to several emissions compared with Accord (eg, catechol, formaldehyde and styrene)

Continued Use Despite Harm Many individuals continue to use nicotine even when they know it is causing or worsening physical or psychological problems
These come pre-shaped and ready to fill, making them ideal for those who prefer a quick and easy solution
After developing new products in 2013, it was re-launched during the Chinese New Year of 2014