Which of the following is part of the Centers for Disease Control's isolation guidelines?

• A. Maintaining a distance of at least 15 feet from a coughing person when possible
• B. Using sterile single-use needles and syringes multiple times
• C. Washing hands after contact with respiratory secretions
• D. Using hand sanitizer after each patient contact

Answer: (C)

Washing hands after contact with respiratory secretions is the practice that best aligns with CDC isolation precautions. Respiratory secretions can carry infectious agents, and touching them transfers organisms to your hands, which can then contaminate your face or surfaces you touch. Thorough hand washing with soap and water removes these pathogens effectively and is a cornerstone of preventing transmission in isolation settings. The CDC highlights hand hygiene as the single most important infection-control measure, with soap and water preferred when hands are visibly dirty or after potential exposure to certain organisms; alcohol-based hand rubs are also effective when hands aren’t visibly soiled.

The other options don’t fit as part of isolation guidelines: a fixed distance like 15 feet isn’t a CDC-standard isolation requirement, and sharps safety prohibits reusing sterile needles. While hand sanitizer is widely recommended, it isn’t always the correct choice—hand hygiene should follow the appropriate method for the situation, especially when hands are visibly dirty or when dealing with organisms where soap and water is preferred.