What is the minimum recommended handwashing time to effectively clean hands?

The minimum recommended handwashing time to effectively clean hands is 20 seconds. This duration is significant because research has shown that washing hands for at least 20 seconds ensures that soap and water can fully eliminate pathogens, dirt, and viruses from the skin. Proper handwashing technique includes lathering all parts of the hands, including between the fingers and under the nails, for this full duration, which maximizes the removal of harmful microorganisms.

Handwashing for shorter periods, such as 10 or 15 seconds, may not provide sufficient time to effectively loosen and rinse away contaminants. The recommendation of 20 seconds is based on guidelines provided by health authorities, including the Centers for Disease Control and Prevention (CDC), emphasizing the importance of thorough hand hygiene in preventing the spread of illness.