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For cleanest hands, squirt and count to 30

Study provides guidance for most effective use of hand sanitizer

hand sanitizer

RUB TO SCRUB  A study finds that 30 seconds of friction is necessary to kill the most bacteria when using hand sanitizer.

Gadini/Pixabay

By Laura Beil

- More than 2 years ago

BOSTON — You’ve heard the advice: For clean hands, scrub with soap and water for as long as it takes to sing “Happy Birthday” twice.