The advancement of the automatic hand sanitizer dispenser further creates an even more sterile environment. When various individuals use the pump, they will leave behind a variety of bacterial colonies. These colonies will interbreed and lead to a more resistant strain of bacteria that can re-contaminate different hands and would not be completely eliminated by the anti-bacterial soap. Wider spectra or higher levels of resistance, in the colonies that are present, commercial soap dispenser are due to interaction and/or complementation between the resistance genes.Without having a wide variety of individuals touching the pump, bacterial transmission will be eliminated.
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