Is lung cancer contagious?
Generally, lung cancer is not contagious. It is recommended to seek medical attention promptly, identify the cause, and undergo symptomatic treatment under the guidance of a professional physician. The detailed explanation is as follows:

Lung cancer is a malignant tumor originating from the bronchial mucosa or glands of the lung and develops due to multiple factors, including smoking, air pollution, occupational exposure, genetic factors, among others. These pathogenic factors mainly affect internal cellular variation and proliferation within the individual rather than spreading directly through external contact. Therefore, in normal daily interactions such as shaking hands, hugging, or sharing meals, lung cancer cannot be transmitted to others. Lung cancer is not transmissible through everyday contact. However, to prevent lung cancer and other respiratory diseases, it is recommended to maintain healthy lifestyle habits, such as quitting smoking, avoiding prolonged exposure to polluted air environments, and undergoing regular medical check-ups.
Additionally, individuals with a family history of lung cancer or other high-risk factors should pay closer attention to their health and undergo regular relevant screenings.