Other non-smoking risk factors for lung cancer include passive smoking (10), viral infections such as human papilloma virus (HPV) (11), low body mass index (BMI) (12), diet (significantly lower grain and carbohydrate consumption in patients with epidermal growth factor receptor (EGFR) mutations) (13), socioeconomic status (14), and exposures to arsenic, asbestos and radon (15). The gene discussed is EGFR; the disease is viral infectious disease.