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2. Bag valve mask - Wikipedia

   en.wikipedia.org/wiki/Bag_valve_mask

   The BVM consists of a flexible air chamber (the "bag", roughly 30 cm in length), attached to a face mask via a shutter valve. When the face mask is properly applied and the "bag" is squeezed, the device forces air through into the patient's lungs; when the bag is released, it self-inflates from its other end, drawing in either ambient air or a ...

3. Face masks with valves don’t stop COVID-19 from spreading - AOL

   www.aol.com/face-masks-valves-don-t-160000078.html

   Mask valves might make you breathe a little easier, but when it comes to fighting COVID, wearing one is a bad move. When shopping for face masks to prevent the spread of COVID-19, you don’t need ...

4. Face masks during the COVID-19 pandemic - Wikipedia

   en.wikipedia.org/wiki/Face_masks_during_the...

   US Ambassador to Indonesia Sung Kim accompanied by local officials at the Presidential Palace wearing face masks amid the COVID-19 pandemic. During the COVID-19 pandemic, face masks or coverings, including N95, FFP2, surgical, and cloth masks, have been employed as public and personal health control measures against the spread of SARS-CoV-2, the virus that causes COVID-19.

5. Which face masks actually work against COVID-19? - AOL

   www.aol.com/face-masks-actually-against-covid...

   In August, Etsy’s quarterly earnings report showed mask sales on the site reached $346 million in the second quarter of 2020. During the same period, face mask sales netted the struggling ...

6. Elastomeric respirator - Wikipedia

   en.wikipedia.org/wiki/Elastomeric_respirator

   During the COVID-19 pandemic, masks with unfiltered-exhalation valves ran counter to the requirements of some mandatory mask orders. [60] [61] Despite the aforementioned belief, a 2020 research by the NIOSH and CDC shows that an uncovered exhalation valve already provides source control on a level similar to, or even better than, surgical masks.

7. United Airlines joins coronavirus face mask valve ban - AOL

   www.aol.com/news/united-airlines-joins...

   United Airlines is the latest commercial air carrier to update its coronavirus-related personal protective equipment guidance to exclude face masks with built-in exhaust valves, the company ...