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CDC H1N1 Flu | Interim Recommendations for Facemask and Respirator Use to Reduce Novel Influenza A (H1N1) Virus Transmission
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Multi-Year Study Compares Surgical Masks to Respirators for Flu and Respiratory Virus Protection | Children's Hospital Colorado
Doctors fear 'unacceptable risk' on Melbourne coronavirus ward without specialist N95 masks - ABC News
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Amazon.com: Alpha Pro Tech Particulate Respirator 695, Teal Stripe, One Size Fits All, Pack of 6 (210 Count, 35/Box) : Tools & Home Improvement
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Surgical masks as good as respirators for flu and respiratory virus protection: Newsroom - UT Southwestern, Dallas, TX
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CDC says surgical masks can replace N95 masks for coronavirus protection in some cases - The Washington Post
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