Distinguish standard precautions from transmission-based precautions.

• A. Standard precautions apply to all patients to prevent contact with bodily fluids; transmission-based precautions are additional measures for patients with known or suspected infections (contact, droplet, airborne).
• B. Standard precautions apply only to airborne infections.
• C. Transmission-based precautions replace standard when infection is suspected.
• D. Standard precautions are optional.

Answer: (A)