When must a knife be cleaned and sanitized?

What is the main causes of gray hairs and balding? write your answer in 2 paragraphs

While carrying a rack of tubes containing blood to be discarded in the biohazard container, jennifer slips and falls. the tubes scatter everywhere, but, fortunately, only three of them break. this accident occurred in the main hallway, so jennifer needs to think fast and get this mess cleaned up. what ppe should jennifer apply?

Is it ok for your junk to be 17inches in diameter and this is school related