Which term matches this definition? treating all human blood and other potentially infectious material, as if known to be infectious, for bloodborne pathogens.

This is known as Universal Precaution.

Universal precautions is an approach to infection control to treat all human blood and certain human body fluids as if they were known to be infectious for HIV, HBV and other bloodborne pathogens. Universal precautions are intended to prevent parenteral, mucous membrane, and nonintact skin exposures of health-care workers to bloodborne pathogens.

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answer; eat a strict gluten-free diet;