The details of the 20 second hand wash 

The details of the 20 second hand wash

Thursday, October 30, 2025

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We all know we’re supposed to wash our hands for 20 seconds, but why exactly 20? Was it chosen because that’s how long it takes to hum “Happy Birthday” twice, or is there actual science behind it? Time to lather up your knowledge and test yourself with this quiz. 

 

 


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Genesis HealthCare System’s Health and Wellness content conveniently provides accurate and helpful information. Your health history and current health may impact suggestions provided through our Health and Wellness content. Although we hope this information is helpful, it is not a substitute for your doctor's medical advice. Before making any significant changes, please consult your doctor.