In countries such as Indonesia, clove cigarettes, locally known as "kretek," have been a part of the culture for centuries, often associated with social gatherings, celebrations, and rituals
The numbers are stamped on and can sometimes be hard to read or find depending on where they were placed
In another large study of teenagers who had never previously smoked cigarettes or used e-cigarettes, a bi-directional association was found between symptoms of depression and e-cigarette use
Also, a study estimated the carcinogenic potency of secondhand smoke from IQOS to be three orders of magnitude lower than cigarettes 95 , and another study showed that IQOS does not impair indoor air quality and does not lead to acute health risks for bystanders 96
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