And... the Aussie Govt:
Conclusion
The scientific evidence shows that passive smoking causes lower respiratory illness in children and lung cancer in adults and contributes to the symptoms of asthma in children. Passive smoking may also cause coronary heart disease in adults. It is estimated that passive smoking contributes to the symptoms of asthma in 46,500 Australian children each year and causes lower respiratory illness in 16,300 Australian children. It also causes about 12 new cases of lung cancer each year in adult Australians. Passive smoking may also cause 77 deaths a year from coronary heart disease.
http://www7.health.gov.au/nhmrc/publ...htm#conclusion