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Peter mcdonald has been a plumber and latterly a medical

Peter mcdonald has been a plumber and latterly a medical heating engineer for over 30 years here’s what he has to say about the job. Human pathogens from soil and raw sewage can enter the body through the nose or mouth, particularly if a person drinks contaminated water or by touching contamination and then touching your mouth or nose exposure can also occur through open wounds or by inhaling (human pathogens in dust, for example). If your boiler.

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