Which of the following is NOT considered a potentially infectious material?

Saliva without blood contamination is indeed the correct choice for something that is not considered potentially infectious material under the standard definitions provided by guidelines like those from OSHA. While saliva can carry certain pathogens, the presence of blood is a significant factor in designating a fluid as potentially infectious. In most cases, blood and other bodily fluids, like vaginal secretions and cerebrospinal fluid, are classed as potentially infectious materials because they are known carriers of bloodborne pathogens such as HIV and Hepatitis B and C. Therefore, saliva on its own—when free of blood—is generally not classified as presenting the same level of risk for bloodborne pathogen transmission as the other listed fluids. This distinction is important for understanding safe practices and adherence to protocols in environments where exposure to bloodborne pathogens is a concern.