Which of the following is NOT considered potentially infectious body fluid?

Sweat is not considered a potentially infectious body fluid because it does not typically carry pathogens that can lead to infection in the same way that blood, vaginal secretions, and cerebrospinal fluid do. Blood is known to transmit various bloodborne pathogens, including viruses like HIV and Hepatitis B. Vaginal secretions can also harbor sexually transmitted infections and other pathogens. Cerebrospinal fluid, which surrounds the brain and spinal cord, can contain infectious agents in cases of meningitis or other central nervous system infections. In contrast, sweat is primarily composed of water and electrolytes, and while it can carry bacteria, it is not associated with significant risk of transmitting infectious diseases. Thus, it is not classified as a potentially infectious body fluid.