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March 10, 2010

Surgical Masks vs N95 Respirators for Preventing Influenza

JAMA. 2010;303(10):937-939. doi:10.1001/jama.2010.193

To the Editor: The study by Dr Loeb and colleagues1 concluded, “Among nurses in Ontario tertiary care hospitals, use of a surgical mask compared with an N95 respirator resulted in noninferior rates of laboratory-confirmed influenza.” However, the study methods did not describe the filtering efficiency of the surgical masks that were used in this study.

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