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CDC: Masks with exhalation valves, vents should not be worn to prevent spread of COVID-19 | KRON4
With diving gear and plumbing supplies, labs respond to Covid-19 - STAT
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Disposable Respiratory Protection | Particulate Respirators | Moldex
Wearing a face mask with a valve? It might be time to find something else, some experts say - The Boston Globe
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Why do some face masks have valves and why are they being banned? | The Independent | The Independent
Munson Army Health Center - Masks with Exhalation Valves or Vents The purpose of masks is to keep respiratory droplets from reaching others to aid with source control. Masks with one-way valves
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JetBlue to ban masks with vents and valves amid COVID spikes
CDC mask guidance: Masks with valves don't prevent coronavirus spread - The Washington Post
Face masks with valves or vents do not prevent spread of coronavirus, CDC says | The Seattle Times
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JBSA outlines changes to mask policy > Joint Base San Antonio > News
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CDC warns masks with valves, vents don't prevent spread of COVID-19
Avoid wearing coronavirus face masks with vents, valves, CDC says in updated guidance | Fox News
Health Dept. Urges Not to Wear Facemasks with Vents | New Lebanon CSD
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Gundersen Health System - UPDATE: Face coverings with vents are NOT allowed to be worn at our locations. While all patients, visitors and staff entering a Gundersen location are required to wear
