Key points

  • Environmental tobacco smoke is classed as a human carcinogen by the World Health Organization. There are no safe levels of exposure.
  • Children exposed to second-hand smoke are at an increased risk of sudden infant death syndrome, acute respiratory infections, ear problems and more severe asthma. Parental smoking causes respiratory symptoms and slows lung growth in children.
  • Smoke-free legislation results in significantly reduced respiratory symptoms and improved lung function.

See the entire Passive smoking Chapter