Coronavirus: Expert panel to assess face mask use by public

Sky Eclat

JF-Expert Member
Oct 17, 2012
45,452
2,000
Should more of us wear face masks to help slow the spread of coronavirus?

This question is to be assessed by a panel of advisers to the World Health Organization (WHO).

The group will weigh up research on whether the virus can be projected further than previously thought; a study in the US suggests coughs can reach 6m and sneezes up to 8m.

The panel's chair, Prof David Heymann, told BBC News that the new research may lead to a shift in advice about masks.

The former director at the WHO explained: "The WHO is opening up its discussion again looking at the new evidence to see whether or not there should be a change in the way it's recommending masks should be used."

What is the current advice?

The WHO recommends keeping a distance of at least 1m from anyone coughing or sneezing to avoid the risk of infection.

It says people who are sick and show symptoms should wear masks.

But it advises that healthy people only need to wear them if they are caring for others suspected of being infected or if they themselves are coughing or sneezing.

It emphasises that masks are only effective if combined with frequent hand-washing and used and disposed of properly.

The UK, along with other countries including the US, advises that social distancing should mean staying at least 2m apart.

This advice is based on evidence showing that viruses can only be transmitted while carried within drops of liquid.

The understanding is that most of those drops will either evaporate or fall to the ground near to the person who released them.

So what does the new research say?

Researchers at the Massachusetts Institute of Technology (MIT) in Cambridge, US, used high-speed cameras and other sensors to assess precisely what happens after a cough or sneeze.

They found that an exhalation generates a small fast-moving cloud of gas that can contain droplets of liquid of varying sizes - and that the smallest of these can be carried in the cloud over long distances.

The study - conducted in laboratory conditions - found that coughs can project liquid up to 6m away and that sneezes, which involve much higher speeds, can reach up to 8m away.

What are the implications?

The scientist who led the study, Prof Lydia Bourouiba of MIT, told me that she is concerned about the current concept of "safe distances".

"What we exhale, cough or sneeze is a gas cloud that has high momentum that can go far, traps the drops of all sizes in it and carries them through the room," she said.

"So having this false idea of safety at one to two metres, that somehow drops will just fall to the ground at that distance is not based on what we have quantified, measured and visualised directly."

Does this change the advice about masks?

Prof Bourouiba's view is that in certain situations, especially indoors in poorly ventilated rooms, wearing masks would reduce the risks.

For example, when facing someone who's infected, masks could help divert the flow of their breath and its load of virus away from your mouth.

"Flimsy masks are not going to protect from inhaling the smallest particulates in the air because they do not provide filtration," Prof Bourouiba said.

"But they would potentially divert the cloud that is being emitted with high momentum to the side instead of forward."

According to Prof Heymann, the new research from MIT and other institutions will be evaluated because it suggests that droplets from coughs and sneezes could be projected further than originally thought.

He said that if the evidence is supported, then "it might be that wearing a mask is equally as effective or more effective than distancing."

But he adds a warning that masks need to be worn properly, with a seal over the nose. If they become moist, Prof Heymann explained, then particles can pass through. People must remove them carefully to avoid their hands becoming contaminated.

He adds that masks need to be worn consistently.

"It's not on to wear a mask and then decide to take it off to smoke a cigarette or eat a meal - it must be worn full time," he said.

The panel, known as the Strategic and Technical Advisory Group for Infectious Hazards, is due to hold its next virtual meeting in the next few days.

A spokesperson for Public Health England said there was little evidence of widespread benefit from wearing masks outside clinical settings.

"Facemasks must be worn correctly, changed frequently, removed properly, disposed of safely and used in combination with good universal hygiene behaviour in order for them to be effective.

Research also shows that compliance with these recommended behaviours reduces over time when wearing facemasks for prolonged periods."

Aren't countries changing their advice on masks anyway?

Long popular in many countries in Asia, masks are now being assessed for public use by the US Centers for Disease Control (CDC).

In Austria, the police now wear them and anyone dealing with the police will have to wear one too. Supermarkets there will insist that customers do too.

A once-rare sight in Europe is becoming more common, and new advice from the WHO would accelerate that change.
 

Sky Eclat

JF-Expert Member
Oct 17, 2012
45,452
2,000
Wataalam wanasema ukikohoa virusi vinaruka mita sita kutoka ulipo na kupiga chafya mita nane kutoka ulipo. WHO inaangalia tena tamko lake la matumizi ya mask 😷 za uso. Ikiwezekana kila anaetoka nje ya nyumba yake avae mask.
 

Mgugu

JF-Expert Member
Jul 1, 2015
2,154
2,000
Wataalam wanasema ukikohoa virusi vinaruka mita sita kutoka ulipo na kupiga chafya mita nane kutoka ulipo. WHO inaangalia tena tamko lake la matumizi ya mask za uso. Ikiwezekana kila anaetoka nje ya nyumba yake avae mask.
Sasa bibi nikivaa barakoa si nitaziba pua na mdomo tu, wakati vikorona tumeambiwa vinapenya hadi kwenye macho.
Chukulia nimekaa mita 2 kutoka mgonjwa alipo halafu akapiga chafya bila kuziba mdomo, hata nikivaa hizo barakoa bado nitaambukizwa kupitia kwenye macho.
Labda ipitishwe sheria ya kuvaa mask pamoja na goggles za kuogelea.

Maendeleo hayana chama
 

Sky Eclat

JF-Expert Member
Oct 17, 2012
45,452
2,000
Sasa bibi nikivaa barakoa si nitaziba pua na mdomo tu, wakati vikorona tumeambiwa vinapenya hadi kwenye macho.
Chukulia nimekaa mita 2 kutoka mgonjwa alipo halafu akapiga chafya bila kuziba mdomo, hata nikivaa hizo barakoa bado nitaambukizwa kupitia kwenye macho.
Labda ipitishwe sheria ya kuvaa mask pamoja na goggles za kuogelea.

Maendeleo hayana chama
Official advice on whether people should wear masks in public could be changed after new evidence emerged suggesting they could protect people from coronavirus.


The World Health Organisation (WHO) has consistently said that only those who have symptoms or are caring for someone with COVID-19 should wear masks.


But a new study and evidence from Hong Kong indicates masks may have a protective benefit for the public and a panel of WHO experts is due to assess the evidence today with a view to potentially changing their guidance.


Infections disease specialist Professor David Heymann, who is chairing the panel, warned that recommendations on masks were fraught with problems because people often wear them incorrectly or fail to dispose of them properly.


"There is right now a debate about the usefulness of masks because Hong Kong has provided some evidence that masks may be useful in protecting individuals from infection," he told a Chatham House briefing.
 

Sky Eclat

JF-Expert Member
Oct 17, 2012
45,452
2,000
It's not clear yet whether or not that's true.


"WHO, the group that I work with, is debating that with a group of experts around the world... to understand whether there is evidence which would call for a change in what WHO is recommending now for masks - which is that they really don't have a major role in protecting people from infection except in healthcare workers where they also wear eye protection and they also have a role from protecting others from coughs or sneezing.


"But as the evidence becomes available, it seems there will be a debate trying to decide whether masks play a role at some point in the outbreak.


"And believe me, if they do, there is a private sector healthy enough to begin producing those masks in quantities necessary."


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Data collected in Hong Kong around the use of masks has been shared confidentially with WHO and is expected to be published soon.


But a separate study conducted under laboratory conditions at the Massachusetts Institute of Technology (MIT) in Cambridge, US, found that coughs can project liquid droplets up to 6m away and that sneezes reach up to 8m.


Scientists involved in the research say their results indicate that wearing higher-quality masks could reduce the risks in some environments, particularly in badly ventilated rooms.


Meanwhile, Prof Heymann urged caution for people who choose to buy £39 antibody home testing kits advertised on Facebook which detect whether or not they have had COVID-19.


"That's up to the person, if you are buying for your own interest in knowing if you have an antibody then why not buy it?" he said.


"But the problem is that you don't know if this is a highly specific or sensitive test unless you have read the package insert or asked the company what is the sensitivity or specificity.


"It is a free world, anybody can buy what they want to buy and use it, but you need to think twice as to whether it is a wise investment for the purposes that you want the test for.


"If you want to just see if you have coronavirus antibody then you could check it.


"If you want to see if you have COVID antibody then you might want to do a little bit more detailed investigation as to what that test is telling you."


He added that it was not yet known whether having immunity to COVID-19 is long-lasting.


"We don't know yet in the new coronavirus that causes COVID-19 whether or not that coronavirus does cause long-lasting immunity and therefore we can't make too many assumptions," he added.


"It would be nice to say 'if I have antibody I feel a bit safer going back out into the public' but with the caveat that I don't understand how long that immunity would last.


"Certainly, a reinsertion strategy would say yes, people who have antibody to this coronavirus could at least begin to work possibly, depending on what a country risk tolerance is, they could begin to working properly back in society and then we will know."


Meanwhile, he said that the UK has "hopefully" avoided a major surge of demand on hospitals.


"Because Italy had been focusing on outbreak containment and wasn't watching what was happening in its hospitals and all of a sudden hospitals became overwhelmed with patients and they weren't able to accommodate them all," he said.


"They didn't have sufficient ventilators and they had a very high level of mortality occurring, so countries then adapted their strategies to a strategy that was more aimed at making sure there was not a surge of patients in the hospitals but rather there could be a more balanced arrival of patients in hospital.


"To do that, many countries developed a delay strategy and among that was the UK which has delayed a major surge, hopefully."
 

black sniper

JF-Expert Member
Dec 10, 2013
16,215
2,000
Hili nimewaza sana na ninaona watu wengi wanavaa mask
Ingawa walisema mask inasaidia mtu kutokuendelea kusambaza ugonjwa lakini kama virus wanakaa hewani itakuwaje?
Unapishana na mtu anapiga chafya na virus wanatapakaa na kutua kwenye mask na kipaji cha uso na kwenye mashavu
Kweli wataalamu bado wanakuna vichwa kuhusu hili janga
Mimi mpaka nje kutoka nimekuwa na wasiwasi Bora kukaa tu ndani na kufuata ushauri wao kila wakati
Tumejifungia ndani lakini watu wanakufa kila masaa 24 wanaongezeka tu
Mungu tusaidie kwani binadamu tuna uwezo mdogo sana bado kwa mambo mengi


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Sky Eclat

JF-Expert Member
Oct 17, 2012
45,452
2,000
Hili nimewaza sana na ninaona watu wengi wanavaa mask
Ingawa walisema mask inasaidia mtu kutokuendelea kusambaza ugonjwa lakini kama virus wanakaa hewani itakuwaje?
Unapishana na mtu anapiga chafya na virus wanatapakaa na kutua kwenye mask na kipaji cha uso na kwenye mashavu
Kweli wataalamu bado wanakuna vichwa kuhusu hili janga
Mimi mpaka nje kutoka nimekuwa na wasiwasi Bora kukaa tu ndani na kufuata ushauri wao kila wakati
Tumejifungia ndani lakini watu wanakufa kila masaa 24 wanaongezeka tu
Mungu tusaidie kwani binadamu tuna uwezo mdogo sana bado kwa mambo mengi


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Kuvaa mask kunasaidia. Ukiingia ndani toe kalkwater kushika zile Kamba na kuweka kwenye bin. Ukimaliza nawa mikono ukiweza za uso.

Toka nje hata kwa nusu saa upate fresh air na kustretch miguu
 

black sniper

JF-Expert Member
Dec 10, 2013
16,215
2,000
Kuvaa mask kunasaidia. Ukiingia ndani toe kalkwater kushika zile Kamba na kuweka kwenye bin. Ukimaliza nawa mikono ukiweza za uso.

Toka nje hata kwa nusu saa upate fresh air na kustretch miguu
Asante kwa ushauri
Natoka kwa mazoezi asubuhi kwa muda wa nusu saa tu
Ila utafikiri ghost town hakuna mtu
Nashangaa nimeona fox daa mjini kweupe
Kwa kweli hali inatisha mpaka unajiuliza hivi ni airborne huu ugonjwa?
Mbona wanapukutika hivi
Nje kunatisha huku
Tuombeane Mungu sana


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Querido

Senior Member
May 12, 2014
157
225
Should more of us wear face masks to help slow the spread of coronavirus?

This question is to be assessed by a panel of advisers to the World Health Organization (WHO).

The group will weigh up research on whether the virus can be projected further than previously thought; a study in the US suggests coughs can reach 6m and sneezes up to 8m.

The panel's chair, Prof David Heymann, told BBC News that the new research may lead to a shift in advice about masks.

The former director at the WHO explained: "The WHO is opening up its discussion again looking at the new evidence to see whether or not there should be a change in the way it's recommending masks should be used."

What is the current advice?

The WHO recommends keeping a distance of at least 1m from anyone coughing or sneezing to avoid the risk of infection.

It says people who are sick and show symptoms should wear masks.

But it advises that healthy people only need to wear them if they are caring for others suspected of being infected or if they themselves are coughing or sneezing.

It emphasises that masks are only effective if combined with frequent hand-washing and used and disposed of properly.

The UK, along with other countries including the US, advises that social distancing should mean staying at least 2m apart.

This advice is based on evidence showing that viruses can only be transmitted while carried within drops of liquid.

The understanding is that most of those drops will either evaporate or fall to the ground near to the person who released them.

So what does the new research say?

Researchers at the Massachusetts Institute of Technology (MIT) in Cambridge, US, used high-speed cameras and other sensors to assess precisely what happens after a cough or sneeze.

They found that an exhalation generates a small fast-moving cloud of gas that can contain droplets of liquid of varying sizes - and that the smallest of these can be carried in the cloud over long distances.

The study - conducted in laboratory conditions - found that coughs can project liquid up to 6m away and that sneezes, which involve much higher speeds, can reach up to 8m away.

What are the implications?

The scientist who led the study, Prof Lydia Bourouiba of MIT, told me that she is concerned about the current concept of "safe distances".

"What we exhale, cough or sneeze is a gas cloud that has high momentum that can go far, traps the drops of all sizes in it and carries them through the room," she said.

"So having this false idea of safety at one to two metres, that somehow drops will just fall to the ground at that distance is not based on what we have quantified, measured and visualised directly."

Does this change the advice about masks?

Prof Bourouiba's view is that in certain situations, especially indoors in poorly ventilated rooms, wearing masks would reduce the risks.

For example, when facing someone who's infected, masks could help divert the flow of their breath and its load of virus away from your mouth.

"Flimsy masks are not going to protect from inhaling the smallest particulates in the air because they do not provide filtration," Prof Bourouiba said.

"But they would potentially divert the cloud that is being emitted with high momentum to the side instead of forward."

According to Prof Heymann, the new research from MIT and other institutions will be evaluated because it suggests that droplets from coughs and sneezes could be projected further than originally thought.

He said that if the evidence is supported, then "it might be that wearing a mask is equally as effective or more effective than distancing."

But he adds a warning that masks need to be worn properly, with a seal over the nose. If they become moist, Prof Heymann explained, then particles can pass through. People must remove them carefully to avoid their hands becoming contaminated.

He adds that masks need to be worn consistently.

"It's not on to wear a mask and then decide to take it off to smoke a cigarette or eat a meal - it must be worn full time," he said.

The panel, known as the Strategic and Technical Advisory Group for Infectious Hazards, is due to hold its next virtual meeting in the next few days.

A spokesperson for Public Health England said there was little evidence of widespread benefit from wearing masks outside clinical settings.

"Facemasks must be worn correctly, changed frequently, removed properly, disposed of safely and used in combination with good universal hygiene behaviour in order for them to be effective.

Research also shows that compliance with these recommended behaviours reduces over time when wearing facemasks for prolonged periods."

Aren't countries changing their advice on masks anyway?

Long popular in many countries in Asia, masks are now being assessed for public use by the US Centers for Disease Control (CDC).

In Austria, the police now wear them and anyone dealing with the police will have to wear one too. Supermarkets there will insist that customers do too.

A once-rare sight in Europe is becoming more common, and new advice from the WHO would accelerate that change.
Aise asante kwa ushauri....nisaidie kunieleleza hili.....


Navojua virus ni wadogo kiasi kwa ni kitu km condom ndo inaweza kuwazuia wasipenye je....Mask inawezaje kuwazuia kupenya??
 

LIKE

JF-Expert Member
Dec 17, 2013
4,500
2,000
Asante kwa ushauri
Natoka kwa mazoezi asubuhi kwa muda wa nusu saa tu
Ila utafikiri ghost town hakuna mtu
Nashangaa nimeona fox daa mjini kweupe
Kwa kweli hali inatisha mpaka unajiuliza hivi ni airborne huu ugonjwa?
Mbona wanapukutika hivi
Nje kunatisha huku
Tuombeane Mungu sana


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black sniper unaogopa

gangamala..

uliko kuna health facility za uhakika..na chakula;

bongo;we we na Mola wako,..na ukijifungia ndani unakufa njaa na ukitoka nje kuna mdudu corona.!

NO ESCAPE

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black sniper

JF-Expert Member
Dec 10, 2013
16,215
2,000
black sniper unaogopa

gangamala..

uliko kuna health facility za uhakika..na chakula;

bongo;we we na Mola wako,..na ukijifungia ndani unakufa njaa na ukitoka nje kuna mdudu corona.!

NO ESCAPE

Sent using Jamii Forums mobile app
Mkuu watu wako na anxiety sana na watoto mpaka huruma shule zimefungwa wamekuwa tofauti ingawa wanafundishwa kwa njia ya mtandao
Kuhusu huduma za kiafya Kweli zipo ila hata hospitali hakuna kwenda ukipiga simu kwa GP huruhusiwi kwenda unaongea nao kwa video call kama ni hatari zaidi ndio unaenda kwa uangalizi mkubwa sana
Tunashukuru kwa huduma zao na hata malipo tutalipwa kwa kulala na malipo mengi yamefutwa kabisa
Hili janga linamaliza watu mkuu sio utani
Tuombe Mungu sana na kujikinga social distancing inahitajika sana
Acha nivae tu nikitoka


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Sky Eclat

JF-Expert Member
Oct 17, 2012
45,452
2,000
Mkuu watu wako na anxiety sana na watoto mpaka huruma shule zimefungwa wamekuwa tofauti ingawa wanafundishwa kwa njia ya mtandao
Kuhusu huduma za kiafya Kweli zipo ila hata hospitali hakuna kwenda ukipiga simu kwa GP huruhusiwi kwenda unaongea nao kwa video call kama ni hatari zaidi ndio unaenda kwa uangalizi mkubwa sana
Tunashukuru kwa huduma zao na hata malipo tutalipwa kwa kulala na malipo mengi yamefutwa kabisa
Hili janga linamaliza watu mkuu sio utani
Tuombe Mungu sana na kujikinga social distancing inahitajika sana
Acha nivae tu nikitoka


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Ninasikia Prince William amejitolea kuwa rubani wa helicopter kuwahisha wagonjwa hospitali katika kipindi hiki.
 

cariha

JF-Expert Member
Apr 9, 2015
11,507
2,000
Nadhani Hawa virus wanasambaa kwa hewa pia haiwezekani watu wavae mask, sijui quarantine yet vifo vinakuwa vingi.
Hili nimewaza sana na ninaona watu wengi wanavaa mask
Ingawa walisema mask inasaidia mtu kutokuendelea kusambaza ugonjwa lakini kama virus wanakaa hewani itakuwaje?
Unapishana na mtu anapiga chafya na virus wanatapakaa na kutua kwenye mask na kipaji cha uso na kwenye mashavu
Kweli wataalamu bado wanakuna vichwa kuhusu hili janga
Mimi mpaka nje kutoka nimekuwa na wasiwasi Bora kukaa tu ndani na kufuata ushauri wao kila wakati
Tumejifungia ndani lakini watu wanakufa kila masaa 24 wanaongezeka tu
Mungu tusaidie kwani binadamu tuna uwezo mdogo sana bado kwa mambo mengi


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Sent using Jamii Forums mobile app
 

black sniper

JF-Expert Member
Dec 10, 2013
16,215
2,000
Nadhani Hawa virus wanasambaa kwa hewa pia haiwezekani watu wavae mask, sijui quarantine yet vifo vinakuwa vingi.

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Hata mimi naamini hivyo kwa sababu hukubaliwi hata kwenda hospitali kama zamani
Ukitoka mara nyingi unapigwa faini (ni Ulaya)
Labda wanaogopa kutuambia ukweli ili kisiwe na taharuki
Kila siku WHO wanatoa mwongozo wa kiaina


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black sniper

JF-Expert Member
Dec 10, 2013
16,215
2,000
Ninasikia Prince William amejitolea kuwa rubani wa helicopter kuwahisha wagonjwa hospitali katika kipindi hiki.
Sijasikia hii
Sidhani kama inawezekana maana wote wanajilinda sana kwa sasa na yeye ndio Mfalme wa baadae
Labda ni fake news


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