What is the single most important practice to prevent the spread of germs?

Hand washing is the single most important practice to prevent the spread of germs because it effectively eliminates pathogens from the hands. Proper hand washing involves using soap and water to scrub all surfaces of the hands for at least 20 seconds, which significantly reduces the number of germs present. This is particularly crucial in settings where close interaction with individuals occurs, such as in healthcare or direct support environments.

While using hand sanitizer can be effective in certain situations—especially when soap and water are not available—it may not be as effective when hands are visibly dirty or greasy. Wearing gloves can also help prevent the transfer of germs, but they do not eliminate the need for hand hygiene since gloves can become contaminated. Cleaning surfaces is essential for maintaining a hygienic environment but does not address personal hand cleanliness, which is critical for preventing cross-contamination. Hand washing remains the foundational practice for infection control, highlighting its importance in reducing the transmission of germs.