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. It is known that tobacco-smoke contains ozone . Summarizing one can say that there may be a causal connection between the exposure to ozone and leukaemia. Strange enough this has, up till now, been overlooked in international cancer research.
Direct research seems urgent, also that of other unnoticed signals.
The more so as a number of body innate antidotes against the biochemical disastrous effects of ozone is known and available.