What is the recommended duration for rubbing hands together when washing them properly?

The recommended duration for rubbing hands together when washing them properly is 20 seconds. This time frame is based on research that has shown it to be effective in removing germs and contaminants from the skin. Rubbing for at least 20 seconds helps ensure that all surfaces of the hands, including areas often missed like the backs of hands, between fingers, and under nails, are thoroughly cleaned.

This duration allows the soap to effectively lift dirt and microbes off the skin, making rinsing more effective. The Centers for Disease Control and Prevention (CDC) and the World Health Organization (WHO) endorse this practice as part of proper hand hygiene to prevent the spread of infections. Ensuring a full 20 seconds also encourages individuals to be mindful about the handwashing process, which is crucial for maintaining public health, especially in settings where the transmission of germs is a concern.