Highlights

•    Waterpipe (WP) tobacco smoke is the main source of metals in the indoor air of WP cafés.
•    Fruit flavored WP tobacco is much heavy metal emission source than the regular tobacco.
•    Exposure to the WP smoke increase expected cancer risk due to the metal concentration.
•    The mean of HQ for Cr were >1, indicating an unacceptably high-risk value.

 

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