Känns som att vi diskuterat detta till leda...
Face masks: what the data say
The science supports that face coverings are saving lives during the coronavirus pandemic, and yet the debate trundles on. How much evidence is enough?
Coronavirus disease (COVID-19): Masks
Masks are a key measure to suppress transmission and save lives.
Masks should be used as part of a comprehensive ‘Do it all!’ approach including physical distancing, avoiding crowded, closed and close-contact settings, good ventilation, cleaning hands, covering sneezes and coughs, and more.
Depending on the type, masks can be used for either protection of healthy persons or to prevent onward transmission.
In areas where the virus is circulating, masks should be worn when you’re in crowded settings, where you can’t be at least 1 metre from others, and in rooms with poor or unknown ventilation. It’s not always easy to determine the quality of ventilation, which depends on the rate of air change, recirculation and outdoor fresh air. So if you have any doubts, it’s safer to simply wear a mask.
Guidance for Wearing Masks
COVID-19 spreads mainly from person to person through respiratory droplets. Respiratory droplets travel into the air when you cough, sneeze, talk, shout, or sing. These droplets can then land in the mouths or noses of people who are near you or they may breathe these droplets in.
Masks are a simple barrier to help prevent your respiratory droplets from reaching others. Studies show that masks reduce the spray of droplets when worn over the nose and mouth.
You should wear a mask, even if you do not feel sick. This is because several studies have found that people with COVID-19 who never develop symptoms (asymptomatic) and those who are not yet showing symptoms (pre-symptomatic) can still spread the virus to other people. Wearing a mask helps protect those around you, in case you are infected but not showing symptoms.
It is especially important to wear a mask when you are indoors with people you do not live with and when you are unable to stay at least 6 feet apart since COVID-19 spreads mainly among people who are in close contact with one another.
Help slow the spread of COVID-19 - wear a face mask!
We have cross-checked all the latest research on the use of face masks during the pandemic.
We recommend using face masks when you are in a confined or crowded public space, you are vulnerable to severe COVID-19, or you have a sick person in your household.
Face masks will be most effective if you also follow physical distancing, proper hand hygiene and good ventilation practices.
COVID-19: Use of masks and face coverings in the community
Wearing a mask or face covering can reduce the risk of people who have COVID-19 spreading the virus to others.
A mask or face covering can help stop infectious droplets spreading when a person speaks, laughs, coughs or sneezes. This is referred to as ‘source control’.
See the World Health Organization’s Advice On The Use Of Masks In The Context Of COVID-19 for more information.
Masks and face coverings can be useful if there is known community transmission and people are near each other (less than 2 metres apart). For example, in shops or other confined or crowded environments.
Även Wikipedia har nu en artikel vid namn Face masks during the COVID-19 pandemic där vi kan läsa bland annat:One More Time – Masks Work
The evidence supports the conclusion that mask-wearing policies are effective and justified.
Ten months into this pandemic there is still discussion about whether or not wearing a facemask helps prevent the spread of COVID-19. There is also some “mask-denial” which may just be poorly informed skepticism or ideologically driven. Masks have become, unfortunately, a political symbol. The evidence is also pretty clear that wearing facemasks helps protect against the spread of COVID-19. But the evidence is complex enough to feed (unjustified) denial, and warrants periodic review.
The use of face masks (or coverings in some cases) has been recommended by health professionals and political authorities to reduce the risk of contagion. About 95% of the world's population live in countries that recommend or mandate the use of masks in public during the pandemic.
The World Health Organization (WHO) in its updated advice dated 5 June 2020 recommends that the general public should wear non-medical fabric masks where there is known or suspected widespread transmission and where physical distancing is not possible, and that vulnerable people (aged over 60 or with underlying health risks) and people with any symptoms suggestive of COVID-19 as well as caregivers and healthcare workers should wear medical masks (defined as surgical or procedure masks). They stated that the purpose of mask usage is to prevent the wearer transmitting the virus to others (source control) and to offer protection to healthy wearers against infection (prevention).
Vilka är dina källor? Vad har du för grund till att motsätta dig munskyddsbärande? Vad är din grund för att avvisa ett vetenskapligt konsensus?A WHO-funded systematic review by Chu et al. (27 June 2020) published in The Lancet found that the usage of face mask could result in a large risk reduction of infection with epidemic-causative betacoronaviruses, in which N95 or similar respirators accounted for a larger risk reduction than disposable surgical or other similar masks. Masks were found to be protective for both healthcare workers and people in communities exposed to infection; evidence supported masking in both healthcare and non-healthcare settings, with no striking differences detected in the effectiveness of masks between the settings.
Kan inte du gå till r/skeptic och posta dina åsikter om munskydd? Skulle vara intressant att se vilken respons du får.