In the two remaining cases, there was some indication of an (inconclusive) association between an identified exposure – contaminated water and/or air due to industrial pollution – to leukaemia. Of the other 69 suspected clusters where a substantial increase in cancer rates were observed, the cause remained unclear. ![]() The study found one cluster investigation where the genuine increase in cancer cases had an identifiable cause: ship builders living in South Carolina who were exposed to asbestos through their work at a naval shipyard. A group in the United States examined the outcome of 428 cancer clusters investigations over two decades in that country and found no real increase in cancer cases above what might have been expected in 87% of “clusters”. Uncertainty remains the most common outcome of cancer cluster investigations. This case helped confirm the now well-accepted link between exposure to asbestos and a number of respiratory diseases. ![]() The investigation did, however, lead to the building of a new ABC complex in Brisbane.Īn earlier and now famous case was the Wittenoom asbestos miners and their families who have been diagnosed with a range of asbestos-related diseases, including mesothelioma, since the mine closed in the 1960s. The precise cause of those cancers remain uncertain, and the result being due to “chance” is still considered likely. Governments are still working out how to deal with the enormous (but as yet unquantified) amount of asbestos in our workplaces, homes and public buildings.
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