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International Studies and Academic Articles

Face Shields and Containment of COVID-19,
​JAMA. Published online April 29th 2020

"Face shields offer a number of advantages. While medical masks have limited durability and little potential for reprocessing, face shields can be reused indefinitely and are easily cleaned with soap and water, or common household disinfectants. They are comfortable to wear, protect the portals of viral entry, and reduce the potential for autoinoculation by preventing the wearer from touching their face. People wearing medical masks often have to remove them to communicate with others around them; this is not necessary with face shields."

​https://jamanetwork.com/journals/jama/fullarticle/2765525
​Author: Eli N. Perencevich, MD, MS​, Epidemiology & Public Health, University of Maryland, Iowa (U.S.)
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WHO: COVID 19 Situation Report 66
March, 26th 2020

"… available evidence indicates that COVID-19 virus is transmitted during close contact through respiratory droplets (such as coughing) and by fomites. The virus can spread directly from person to person when a COVID-19 case coughs or exhales producing droplets that reach the nose, mouth or eyes of another person. Alternatively, as the droplets are too heavy to be airborne, they land on objects and surfaces surrounding the person. Other people become infected with COVID-19 by touching these contaminated objects or surfaces, then touching their eyes, nose or mouth. According to the currently available evidence, transmission through smaller droplet nuclei (airborne transmission) that propagate through air at distances longer than 1 meter is limited to aerosol generating procedures during clinical care of COVID-19 patients."
www.who.int/docs/default-source/coronaviruse/situation-reports/20200326-sitrep-66-covid-19.pdf

 A Useful Face Mask For Endoscopic Examinations, JAMA, Nov. 1950

"For those persons doing bronchoscopic or laryngoscopic examinations, particularly in cases of tuberculosis, adequate protection has been sought. I have used the item described here for many years with adequate protection and vision. ...  It is a face shield used in industry for protection from eye and face hazards. The shield consists of a composition head piece, which is adjustable, and a plastic, transparent face piece measuring 9½ inches (24 cm.) in length and 12⅜ inches (31 cm.) in width. The plastic face piece is removable and easily replaced with snaps and is easily cleaned ... The shield protects the entire face and permits the wearing of glasses without fogging". 
Author Bernard Jaffe
https://jamanetwork.com/journals/jamaotolaryngology/article-abstract/589566?resultClick=1
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Airborne vs. Droplet: Turbulent Gas Cloud of Opinions

Dan Diekema practices infectious diseases, clinical microbiology, and hospital epidemiology in Iowa City, Iowa. After giving an overview over current research and clinical discussion he comes to the conclusion: 
"..., I’m confident that SARS-CoV-2 transmission is similar to that of other respiratory viruses we are used to encountering—for which experience suggests droplet + contact spread to be the primary route of transmission. The trick is determining under what conditions a higher-risk aerosol might be produced-
​
​http://haicontroversies.blogspot.com/2020/04/airborne-vs-droplet-turbulent-gas.html

Faceshield.One ist ein Produkt der
Bluewater Medical GmbH
Faulmannweg 5
24148 Kiel


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