People who smoke are more in danger of getting leukaemia then non-smokers.
Smoking is possibly the main cause of leukaemia with adults.
As the scientists have stated, the statistical connection is evident and cannot be incidental. However, no one understands how tobacco smoke could cause leukaemia. The result of the study, executed by National Institutes of Health Care in the US, has been published in British Medical Journal, September 10, 1988. In his comment, the British professor Dr. Nicholas Wald, remarks, that the connection has been proved but that the mechanism remains obscure. Benzene and radio active materials are a.o. suggested as possible causes of leukaemia, although their doses in tobacco smoke are too small.