We had the ultraviolet lightbox in class today to see how clean our hands are. we had just washed them with soap, but we could still see the white marks on our skin and nails to show where the germs still were.
We had the ultraviolet lightbox in class today to see how clean our hands are. we had just washed them with soap, but we could still see the white marks on our skin and nails to show where the germs still were.
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