'Hand sanitizer is not an alternative to washing hands,' behavior specialist Jaralee Metcalf said
Students touched the pieces of plain white bread with dirty hands, after washing with soap and water and after using hand sanitizer before sealing the pieces in plastic bags and letting them sit for three to four weeks.A piece of bread wiped on Chromebook computers was almost completely black by the end of the experiment, while the one touched by dirty hands wasn’t much different, with two large patches of yellow and green mold beginning to turn black.
“If the bread had been exposed to air and moisture, the experiment may have gone faster,” Metcalf told . “The breads that were very clearly exposed to different germs grew mold quicker. And ones touched by clean hands plus the soap and water ones were not exposed to the germs that cause the mold growth to quicken.”
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