Which precaution involves treating all bodily fluids as infectious, except for sweat?

The correct choice is based on the concept known as "Universal Precautions." This approach originated in the healthcare field to prevent the transmission of bloodborne pathogens. It emphasizes that all bodily fluids should be treated as potentially infectious, with the exception of sweat, which is not known to transmit diseases like HIV or hepatitis. The key aspect of Universal Precautions is that they promote rigorous safety measures, which includes the use of personal protective equipment (PPE), safe handling and disposal of needles and sharps, and other infection control practices. This precaution is crucial in protecting healthcare workers and patients from infections, thereby minimizing the risk of exposure to pathogens present in blood and other bodily fluids.

Other options, while they may relate to safety or personal hygiene, do not specifically address the concept of treating all bodily fluids as potentially infectious, making Universal Precautions the most appropriate answer in this context.