Clin Infect Dis. 2009 Jul 15;49(2):275-7.

A quantitative assessment of the efficacy of surgical and N95 masks to filter influenza virus in patients with acute influenza infection.

Johnson DF, Druce JD, Birch C, Grayson ML.

Source

Infectious Diseases Department, Austin Health, Heidelberg, Victoria, Australia.

Abstract

We assessed the in vivo efficacy of surgical and N95 (respirator) masks to filter reverse transcription-polymerase chain reaction (RT-PCR)-detectable virus when worn correctly by patients with laboratory-confirmed acute influenza. Of 26 patients with a clinical diagnosis of influenza, 19 had the diagnosis confirmed by RT-PCR, and 9 went on to complete the study. Surgical and N95 masks were equally effective in preventing the spread of PCR-detectable influenza.

PMID:: 19522650; [PubMed - indexed for MEDLINE]

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RNA, Viral

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