A comprehensive global study published in 2026 reveals that awareness of the major health risks of tobacco smoking has not improved significantly over the past two decades. The research, which analyzed survey data from more than 240,000 adults across multiple countries, found persistent gaps in public knowledge about the cardiovascular dangers of smoking and the risks associated with secondhand smoke.
The study, titled "Changes in knowledge of the major harms of tobacco smoking," was conducted by an international team of researchers. It compared survey responses from 2008 and 2020 to assess trends in awareness. Despite global tobacco control efforts, the proportion of adults who correctly identified smoking as a cause of heart disease and stroke remained low, with only about 40% of respondents in 2020 recognizing these risks, a figure largely unchanged from 2008.
Similarly, awareness of the health risks of secondhand smoke showed minimal improvement. In 2020, fewer than half of the participants understood that exposure to secondhand smoke could lead to heart disease or lung cancer in non-smokers. The findings highlight a critical gap in public health communication, as many people continue to underestimate the dangers of tobacco use and exposure.
The researchers emphasize the need for renewed and more effective awareness campaigns, particularly in low- and middle-income countries where knowledge gaps are most pronounced. They call for targeted interventions to improve public understanding of the full range of tobacco-related harms, including cardiovascular diseases, which remain a leading cause of death globally.
