Smoking is a leading cause of multiple diseases, including some cancers, heart attacks, strokes and respiratory diseases such as chronic obstructive pulmonary disease. Smoking among pregnant woman increases the risk of low birth weight and premature delivery. The World Health Organization (WHO) estimates that tobacco smoking kills 8 million people in the world every year. More than 1.2 million of these deaths are due to second-hand smoke and 65 000 are among children (WHO, 2020[1]). In 2019, tobacco smoking accounted for 200 million disability-adjusted life‑years worldwide (Reitsma et al., 2021[2]). Although the prevalence of smoking has decreased over the past 30 years, population growth has led to an increase in the total number of smokers, from 0.99 billion in 1990 to 1.14 billion in 2019 worldwide (Reitsma et al., 2021[2]).