Science and Technology 科学技術 Vol.17 / #Coronavirus #コロナウイルス Vol.18(masks マスク)

All the links and excerpts are in English.

Cloth masks do protect the wearer – breathing in less coronavirus means you get less sick (08/19/2020) | @ConversationEDU
Exposure dose determines severity of disease
Masks reduce viral dose
Masks increase rate of asymptomatic cases
…in places where everyone wears masks, the rate of asymptomatic infection seems to be much higher. …

Effectiveness of Cloth Masks for Protection Against Severe Acute Respiratory Syndrome Coronavirus 2 (10/2020) | @CDCgov
Factors to Consider when Using Cloth Masks to Protect Wearers and to Prevent Spread of Infection during the COVID-19 Pandemic
…droplets travel >2 m, in some instances ≒8 m… …SARS-CoV-2 may be transmitted up to 4 m…
…multilayered masks with water-resistant fabric, high number of threads, and finer weave may be more protective… Masks should be able to prevent a stream of fluid flowing at a pressure of up to 160 mm Hg from seeping through the mask and potentially into the mouth. …
Cloth masks…ideally washing in hot water with soap. Other methods or products include using bleach, isopropyl alcohol, or hydrogen peroxide; autoclaving or microwaving; and application of ultraviolet radiation or dry heat…
…in a widespread pandemic, differentiating asymptomatic from healthy persons in the community is very difficult, so at least in high-transmission areas, universal face mask use may be beneficial. The general public should be educated about mask use because cloth masks may give users a false sense of protection because of their limited protection against acquiring infection…

Surgical Masks, Respirators, Face Shields: Which Masks Actually Protect Against Coronavirus? (02/28/2020) | @MedicalExpoEmag
… The particles of the SARS-CoV-2 virus are extremely small – 0.12 micrometers, 0.12 thousandths of a millimeter – and can last several tens of minutes in the air when they are expelled by someone contaminated who is coughing, talking or even breathing. …
1. Surgical Masks
In Europe…
Type I: bacterial filtering effectiveness > 95%
Type II: bacterial filtering effectiveness > 98%
Type IIR: 98% and splash-resistant
2. Respirators
FFP2: 3M, Honeywell…
3. “Barrier” Masks
4. Face Shields

Coronavirus (COVID-19) – Face masks: How they protect you and when to use them (11/11/2020) | Australian Government Department of Health
Australia DepartmentOfHealth

Some masks offer far less coronavirus protection than others. Bandanas, scarves, and shields do an especially bad job. (11/28/2020) | @businessinsider
One chart shows the best and worst face masks for coronavirus protection – and which situations they’re suited for (11/26/2020) | @businessinsider

Coronavirus disease (COVID-19) advice for the public: When and how to use masks (20/10/2020) | @WHO
The three-layer fabric mask (YouTube)
How to wear a fabric mask (YouTube)

What kind of face mask best protects against coronavirus? (18/08/2020) | @guardian
Why a face shield alone may not protect you from coronavirus (w Radio; 07/08/2020) | @BBC_Future
Coronavirus: What are the rules for face masks or face coverings? (30/10/2020) | @BBC

Can Face Masks Protect You from the 2019 Coronavirus? What Types, When and How to Use | @Healthline
Wear Masks To Protect Yourself From The Coronavirus, Not Only Others, CDC Stresses (11/11/2020) | @NPR
What type of mask works best for COVID-19 protection? (08/14/2020) | @MDAndersonNews
Coronavirus Face Masks & Protection FAQs | @HopkinsMedicine
COVID-19: How much protection do face masks offer?: Get answers to your questions about face masks, including how to use them properly. | @MayoClinic

投稿者: ワールド ソルーションズ