A position statement and practical guide to the use of particulate filtering facepiece respirators (N95, FFP2, or equivalent) for South African health workers exposed to respiratory pathogens including Mycobacterium tuberculosis and SARS-CoV-2Keertan Dheda, Gavin Churchyard, Aaron S Karat et al.|African Journal of Thoracic and Critical Care Medicine|2021Cited by 7