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2. Surgical mask - Wikipedia

   en.wikipedia.org/wiki/Surgical_mask

   A surgical mask, also known by other names such as a medical face mask or procedure mask, is a personal protective equipment used by healthcare professionals that serves as a mechanical barrier that interferes with direct airflow in and out of respiratory orifices (i.e. nose and mouth ). This helps reduce airborne transmission of pathogens and ...

3. N95 respirator - Wikipedia

   en.wikipedia.org/wiki/N95_respirator

   An N95 respirator [1] is a filtering facepiece respirator or elastomeric filter that meets the U.S. National Institute for Occupational Safety and Health (NIOSH) N95 classification of air filtration, meaning that it filters at least 95% of airborne particles that have a mass median aerodynamic diameter of 0.3 micrometers [2] under 42 CFR Part ...

4. Statistics of the COVID-19 pandemic in the United States

   en.wikipedia.org/wiki/Statistics_of_the_COVID-19...

   The CDC publishes official numbers of COVID-19 cases in the United States. The CDC estimates that, between February 2020 and September 2021, only 1 in 1.3 COVID-19 deaths were attributed to COVID-19. [2] The true COVID-19 death toll in the United States would therefore be higher than official reports, as modeled by a paper published in The ...

5. The Emperor: Owner of the Mask - Wikipedia

   en.wikipedia.org/wiki/The_Emperor:_Owner_of_the_Mask

   The Emperor: Owner of the Mask (Korean: 군주 - 가면의 주인) is a South Korean television series starring Yoo Seung-ho, Kim So-hyun, Kim Myung-soo, Yoon So-hee, Huh Joon-ho, and Park Chul-min. It aired on MBC TV from May 10, to July 13, 2017, every Wednesday and Thursday at 22:00 ( KST ).

6. Respirator - Wikipedia

   en.wikipedia.org/wiki/Respirator

   For the mechanical device used to assist breathing, see Ventilator. For the mask worn during surgery, see Respirator § Surgical N95, and Surgical mask. A half-face elastomeric air-purifying respirator. This kind of respirator is reusable, with the filters being replaced periodically. A respirator is a device designed to protect the wearer from ...

7. 2020 United States presidential election - Wikipedia

   en.wikipedia.org/wiki/2020_United_States...

   The 2020 United States presidential election was the 59th quadrennial presidential election, held on Tuesday, November 3, 2020. The Democratic ticket of former vice president Joe Biden and the junior U.S. senator from California Kamala Harris defeated the incumbent Republican president, Donald Trump, and vice president, Mike Pence.

8. Rayon - Wikipedia

   en.wikipedia.org/wiki/Rayon

   Rayon, also called viscose [1] and commercialised in some countries as sabra silk or cactus silk, [2] is a semi-synthetic fiber, [3] made from natural sources of regenerated cellulose, such as wood and related agricultural products. [4] It has the same molecular structure as cellulose.

9. 10–20 system (EEG) - Wikipedia

   en.wikipedia.org/wiki/10–20_system_(EEG)

   10–20 system (EEG) The 10–20 system or International 10–20 system is an internationally recognized method to describe and apply the location of scalp electrodes in the context of an EEG exam, polysomnograph sleep study, or voluntary lab research. This method was developed to maintain standardized testing methods ensuring that a subject's ...