what are the four main universal precautions?
['Hand hygiene1.', 'Gloves. ■ Wear when touching blood, body fluids, secretions, excretions, mucous membranes, nonintact skin. ... ', 'Facial protection (eyes, nose, and mouth) ■ ... ', 'Gown. ■ ... ', 'Prevention of needle stick and injuries from other.', 'Respiratory hygiene and cough etiquette.', 'Environmental cleaning. ■ ... ', 'Linens.']