contact precautions to reduce the spread of infections caused by both direct contact. (A wound) and indirect (exposure to contaminated substances used).
Contact precautions is to reduce the spread of infections resulting from direct contact (touching the wound) and indirect (exposure to contaminated appliances of germs).
Contact precautions to reduce the spread of HIV and that is caused by the direct contact (touching his wound) and indirect (experience of the use of biological contamination).