Potential hazards include frequent exposure to moving mechanical parts, client contact, infectious exposure to computer use; occasional exposure to chemicals, insecticides/pesticides, infectious exposure, exposure to needles/syringes and equipment; exposure to physical and emotional behavior of youths and various states of cleanliness and hygiene of youth and exposure to various bodily fluids. Physical factors include frequent standing, walking, carrying, use of hearing, near/midrange/far vision, depth perception, color/field of vision; driving, typing, bending reaching; occasional sitting, lifting/pushing/pulling, climbing, stooping, kneeling, crawling, manual handling and use of smell.