Universal precautions do not apply to sputum, feces, sweat, vomit, tears, urine, or nasal secretions unless they are visibly contaminated with blood because their transmission of Hepatitis B or HIV is extremely low or non-existent. In 1987, the CDC introduced another set of guidelines termed Body Substance Isolation.
The regulations in the CFR regarding the use of protective clothing and other protective devices clearly state that the only time universal precautions should not be followed is when there is a threat to the safety of the worker or the public.
