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The researchers discovered that 62 and seventy seven % of air samples had been constructive for human adenovirus in workplaces and hospitals, respectively. A few of the preliminary work exhibiting that plumbing systems are a supply of bioaerosols was accomplished in the 1970s when Gerba et al. 60 seeded household toilets with virus (MS-2 bacteriophage) and micro organism (Escherichia coli) prior to flushing.

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