How long should hands be washed to effectively reduce the spread of infections?

Washing hands for at least 20 seconds is the recommended duration to effectively reduce the spread of infections. This duration has been supported by health organizations like the Centers for Disease Control and Prevention (CDC). The reason that 20 seconds is vital is that it ensures thorough cleansing of all surfaces of the hands, including spaces between fingers, under nails, and around the wrists.

When washing hands, it takes adequate time to remove dirt, bacteria, and viruses, particularly in areas that are easy to miss if the washing is too brief. This duration allows for the use of soap and water to form a lather, which helps dislodge and wash away pathogens. Encouraging people to sing a short song or count to 20 can make the process engaging while ensuring they meet the time needed for effective hand hygiene.