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JBSA outlines changes to mask policy > Joint Base San Antonio > News
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JetBlue to ban masks with vents and valves amid COVID spikes
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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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CDC: Masks With Valves or Vents Not Effective
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CDC mask guidance: Masks with valves don't prevent coronavirus spread - The Washington Post
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New Airflow Videos Show Why Masks With Exhalation Valves Do Not Slow the Spread of COVID-19 | NIST
Health Dept. Urges Not to Wear Facemasks with Vents | New Lebanon CSD
CDC warns masks with valves, vents don't prevent spread of COVID-19
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Masks with valves or vents not permitted in SAMHS facilities > Joint Base San Antonio > News
CDC: Do not wear face masks with one-way valves or vents
Why do some face masks have valves and why are they being banned? | The Independent | The Independent
Our masks with breathing valve/vent still offer two layers of protection for others - EverydayMask.ca
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How masks protect against COVID-19: Understanding the science - Boston Children's Answers
CDC: Don't Wear Masks with Vents or Valves | Moffitt
Shelby County Health Department - Check your mask. If it has a vent or valve, it is not the kind of mask that prevents the spread of #COVID-19. Protect the people around
