The pandemic has reinforced what experts have known for a long time.
“Water works as a physical cleanser and washes the organisms and microbes off the hands,” said Dr. Raymond Pontzer, director of infection prevention for UPMC in Pittsburgh, who was not involved in the study. “There is no evidence — and this study reinforces that — that the actual temperature of the water has anything to do with the antimicrobial properties of hand washing.
To all the lazy hand washers, lathering for five seconds isn't enough to remove bacteria. But the researchers found little difference between lathering for 10, 20 or 40 seconds.
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