1) Cancers – lung cancer, nasal sinus cancer and breast cancer (in pre-menopausal young women)
2) Cardiovascular diseases – a local study shows that the risk of a non-smoker dying from a stroke increases according to the number of smokers who lived or worked with that non-smoker. Second-hand smoke causes injuries to blood vessels and disrupts the normal functioning of blood clotting mechanisms.
3) Respiratory diseases – asthma, otitis media (middle ear infection), lower respiratory tract infections and symptoms of respiratory tract irritation.
4) Complications of pregnancy and foetal development – miscarriage, low birth weight and Sudden Infant Death Syndrome (SIDS)