Approximately 2.7 billion people worldwide are passive smokers.

Approximately 2.71 billion non-smoking individuals worldwide are exposed to secondhand tobacco smoke, according to estimates based on 2023 data published by The [source snippet cutoff]. This global total includes 767 million children under the age of 15.

Exposure to secondhand smoke contributed to an estimated 1.66 million deaths globally. The findings highlight the significant public health impact of passive smoking across vulnerable populations.