Dear Editor-in-Chief: Passive smoking, also known as involuntary smoking, second hand smoking or exposure to environmental tobacco smoke (ETS), is defined as in-halation of the cigarette smoke of another individual or the exhale of a smoker (1). Passive smoking can adversely affect the health of non-smokers of all age groups (1). The association of passive smoking with life threatening conditions such as lung cancer, cardiovascular diseases, and sudden infant death syndrome has been well confirmed. Besides, passive smoking is correlated with low birth weight, asthma, bronchitis, pneumonia, otitis media, in-creased incidence of tuberculosis, Crohn’s disease, learning disorders, developmental retardation, high systolic and diastolic blood pressure, child behavior disorders and spontaneous abortion (2-4).