NHSA Module 3 Practice Test

The most effective way to prevent transmission is hand hygiene. Hands are the primary vehicle for spreading germs during routine care and daily activities, touching surfaces, and interacting with others. When you clean your hands properly—wash with soap and water or use an alcohol-based hand rub when hands aren’t visibly dirty—you remove or kill many pathogens before they can be passed to patients, coworkers, or surfaces. Because hands encounter so many potential sources of contamination, hand hygiene has the greatest impact on reducing transmission across a wide range of pathogens and settings. Other measures help, but they don’t replace the need for clean hands: gloves don’t substitute for hand cleaning and can create a false sense of security, prophylactic antibiotics don’t prevent transmission and can drive resistance, and isolating every patient is not practical or necessary. Prioritize clean hands to achieve the largest reduction in transmission risk.