What is the main premise of standard precautions in healthcare?

The main premise of standard precautions in healthcare is that all human blood and body fluids are treated as potentially infectious, which is correctly stated in the option chosen. This approach is essential for infection control and prevention, as it establishes a consistent method of protection regardless of a patient’s known or suspected status.

By assuming that all patients could harbor infectious agents, healthcare workers employ appropriate protective measures such as gloves, masks, and gowns when handling blood, body fluids, or situations where exposure is possible. This helps minimize the risk of transmission of infections, not only to healthcare personnel but also to other patients and visitors.

The other options do not reflect the broad and preventive nature of standard precautions. They imply that only certain patients or circumstances could pose a risk, which can lead to inadequate protective measures and an increased risk of infection spreading within healthcare settings.