Substances such as feces and nasal secretions can be contacted without the need for universal precautions.
The OSHA's Bloodborne Pathogens Standard requires that all human blood and certain human body fluids are treated as if known to be infectious for diseases such as HIV, HBV, Hepatitis B and C, etc.
This implies that personal protective equipments must be worn at all times when handling all human blood samples and this is known as universal precautions.
However, some substances such as feces, nasal secretions, sputum, sweat, tears and urine would be okay to come in contact with without the need for universal precautions.
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