WHO Guidelines on PPE Use are Questioned

WHO Guidelines on PPE Use are Questioned

According to a globally accepted rule of infection control, when performing triage, medical staff do not need any personal protective equipment (PPE) if they maintain at least 1 metre’s distance from a COVID-19 patient. A systematic review of 10 studies, conducted by a team of researchers from the University of New South Wales (UNSW) and the Massachusetts Institute of Technology (MIT), found that the above rule is based on outdated data and insufficient evidence.

The authors aimed to review the evidence for horizontal distance travelled by droplets and the guidelines issued by the World Health Organization (WHO), the U.S. Centers for Disease Control and Prevention (CDC) and European Centre for Disease Prevention and Control (ECDC) on respiratory protection for COVID-19.

They note that WHO has issued guidelines for contact and droplet precautions for healthcare workers caring for suspected COVID-19 patients, including an advice to staff to wear a medical face mask, but not a respirator when caring for COVID-19 patients. The use of respirators is reserved for aerosol generating procedures, such as intubation and resuscitation. At the same time, the CDC has initially recommended airborne precautions.

The 1-2-metre distancing rule is central to droplet precautions and assumes that large droplets do not travel further than 2 metres. As co-author and Professor of Global Biosecurity at the UNSW’s Kirby Institute, Raina MacIntyre, told ABC News, it had been around for 80 years and “never been questioned."




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