Ricardo is smearing a slide with a body fluid sample to examine under the compound microscope. Where should he put the disposable stick he uses to smear the slide?

A stick used to smear a body fluid sample is contaminated, so it must be discarded as hazardous waste. Putting it in a pocket or holding it in a free hand risks exposure, and it does not belong with clean, unopened protective equipment. The correct choice is the hazardous waste bin.

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