Effectiveness of N95 respirators versus surgical masks in protecting health care workers from acute respiratory infection: a systematic review and meta-analysis

Public Health Ontario (Smith, MacDougall, Johnstone, Copes, Schwartz, Garber); Department of Medicine (Johnstone), University of Toronto; Dalla Lana School of Public Health (Copes, Schwartz), University of Toronto, Toronto, Ont.; Department of Medicine (Garber), University of Ottawa, Ottawa, Ont.

Public Health Ontario (Smith, MacDougall, Johnstone, Copes, Schwartz, Garber); Department of Medicine (Johnstone), University of Toronto; Dalla Lana School of Public Health (Copes, Schwartz), University of Toronto, Toronto, Ont.; Department of Medicine (Garber), University of Ottawa, Ottawa, Ont.

Public Health Ontario (Smith, MacDougall, Johnstone, Copes, Schwartz, Garber); Department of Medicine (Johnstone), University of Toronto; Dalla Lana School of Public Health (Copes, Schwartz), University of Toronto, Toronto, Ont.; Department of Medicine (Garber), University of Ottawa, Ottawa, Ont.

Public Health Ontario (Smith, MacDougall, Johnstone, Copes, Schwartz, Garber); Department of Medicine (Johnstone), University of Toronto; Dalla Lana School of Public Health (Copes, Schwartz), University of Toronto, Toronto, Ont.; Department of Medicine (Garber), University of Ottawa, Ottawa, Ont.

Public Health Ontario (Smith, MacDougall, Johnstone, Copes, Schwartz, Garber); Department of Medicine (Johnstone), University of Toronto; Dalla Lana School of Public Health (Copes, Schwartz), University of Toronto, Toronto, Ont.; Department of Medicine (Garber), University of Ottawa, Ottawa, Ont.

Public Health Ontario (Smith, MacDougall, Johnstone, Copes, Schwartz, Garber); Department of Medicine (Johnstone), University of Toronto; Dalla Lana School of Public Health (Copes, Schwartz), University of Toronto, Toronto, Ont.; Department of Medicine (Garber), University of Ottawa, Ottawa, Ont.