A new study published in the medical journal Thorax has revealed that children exposed to their parents’ cigarette smoke may unknowingly pass on lung damage to their own children and grandchildren, increasing the risk of chronic respiratory diseases. The research highlights the intergenerational harm of passive smoking, urging fathers in particular to avoid smoking around their children.
Key Findings
- The study found that exposure to cigarette smoke in childhood is not limited to immediate health risks but can impair lung function in future generations.
- Children and grandchildren of smokers were shown to have a higher likelihood of developing Chronic Obstructive Pulmonary Disease (COPD), a condition that causes around 3 million deaths globally each year.
- The researchers, who analyzed lung function data from over 8,000 participants as part of the Tasmanian Longitudinal Health Study in Australia, found a clear link between a father’s childhood exposure to passive smoke and below-average lung function in his children.
- The study also showed that children of fathers who were exposed to passive smoke as children had a doubled risk of developing COPD.
This research is significant because it provides evidence for the long-term, intergenerational impact of passive smoking. The authors emphasized that reducing children’s exposure to tobacco smoke is vital not only for their immediate well-being but also for protecting the health of future generations.

