The Centers for Disease Control and Prevention (CDC) Monday released tightened guidance on use of personal protective equipment (PPE) for U.S. health care workers to ensure they are better prepared to treat Ebola patients. The guidance focuses on specific PPE health care workers should use and offers detailed, step-by-step instructions for how to put the equipment on and take it off safely. The enhanced guidelines center on three principles: All health care workers undergo rigorous training and are practiced and competent with PPE, including taking it on and off in a systemic manner. No skin is exposed when PPE is worn. All workers are supervised by a trained monitor who watches each worker taking PPE on and off. The guidance reflects recent experience from safely treating patients with Ebola at Emory University Hospital, Nebraska Medical Center, and National Institutes of Health Clinical Center. Click here to view the CDC guidelines on PPE usage for health care workers treating Ebola patients . Click here for the CDC fact sheet on the updated changes in the PPE guidance .