Standard precautions in a salon mean treating:

Standard precautions mean treating blood and other body fluids from every client as if they could be infectious, because you cannot tell by looking whether someone carries a bloodborne pathogen. In practice this means using gloves and proper procedures whenever blood or body fluids may be involved, disinfecting or discarding contaminated items, and following consistent infection-control steps with all clients — not just those who appear unwell. Applying standard precautions universally is a core safety principle reflected on the exam.