Time to stop masking the truth on protection: How wearing a face mask can protect others and may even be 'polite' at home if you have the virus

Time to stop masking the truth on protection: How wearing a face mask can protect others and may even be 'polite' at home if you have the virus

  • Face masks are being used in Italy and Austria to help lift nationwide lockdowns
  • They act as a physical barrier blocking droplets from leaving your mouth
  • The masks also stop you coming into contact with those shed by others 
  • Learn more about how to help people impacted by COVID

To wear a mask or not to wear a mask is very much the big question. Having initially been told by the Government that there was ‘no evidence’ to support healthy people wearing them, last week a Cabinet source suggested that covering up with a face mask may be a requirement for everyone returning to work once lockdown is lifted.

And just yesterday, 100 top doctors signed a letter calling for the public to wear home-made face masks whenever they leave their homes.

Meanwhile, Dr David Nabarro, special envoy for Covid-19 at the World Health Organisation (WHO), suggested during an interview last week that ‘some form of facial protection is going to become the norm’.

Already it is compulsory to wear masks while shopping or using public transport in Austria and parts of Italy, and those living in the Czech Republic and neighbouring Slovakia must wear masks whenever they go out.

Yet while some believe wearing a mask can act as a physical barrier to prevent infection with coughed or sneezed particles, others argue that people can accidentally infect themselves when taking a mask off, and that a mask can make people less fastidious about adhering to measures proven to slow the disease’s spread, such as hand-washing.

Paul Hunter, a professor in medicine at the University of East Anglia, recently reviewed 31 studies researching the efficacy of face masks in preventing respiratory illness, such as flu, and says the quality of the research is poor.

‘It would be as easy to make an argument for opposing the widespread use of masks as it would be to make an argument promoting their use,’ he says. ‘It’s no wonder the public is confused.’

We asked three experts — Professor Hunter, David Heymann, professor of infectious disease epidemiology at the London School of Hygiene & Tropical Medicine, and Dr Jenna Macciochi, a lecturer in immunology at the University of Sussex — just what we should do.

 

SHOULD I WEAR A MASK TO PROTECT MYSELF?

Face masks provide a physical barrier between you and coronavirus particles in the air, but some are more effective than others.

Thin disposable surgical masks protect from large droplets but won’t block very small particles that may carry the virus.

More advanced masks contain filters that will block the smaller particles — but these are hard to find outside of medical settings. (FFP2 and FFP3 masks are the respirator masks commonly used by doctors and nurses in Europe, while N95 is used by medics in the U.S.)

Dr Macciochi says that ‘to be effective, a mask has to be fitted correctly, worn correctly and disposed of correctly — which is not something the general public has been trained in’.

Not wearing a mask properly, is, she says potentially more hazardous than not using one at all, as you may infect yourself with the very particles the mask is protecting you against when you take it off.

So, which face masks will actually keep you safe?

HOMEMADE MASK

Homemade mask (Stock image)

Homemade mask (Stock image)

WHAT IS IT? From vacuum cleaner bags to sanitary towels and scarves, look online and you will discover that just about anything can be turned into a mask.

COVID-19 EFFECTIVE? A 2013 Public Health England study looked at the suitability of various household materials that could be used as masks to filter bacterial and viral aerosols — and vacuum bags came out well.

Aim for multiple layers — U.S. researchers found that a double layer of tightly-woven cotton with a thread count of at least 180 was one of the best barriers.

WHERE CAN I GET ONE? Search your house and see what’s already there.

SURGICAL MASK

The surgical mask (stock image)

The surgical mask (stock image)

WHAT IS IT? The disposable mask that you see surgical staff wearing. These 3-ply masks are fluid-resistant and prevent infected droplets from the surgical staff entering the respiratory system of the patient.

COVID-19 EFFECTIVE? Thin surgical masks protect from large airborne droplets, but won’t block very small particles that may carry the virus. Once wet their efficacy is reduced, which is why they are disposable. But they are considered to offer better protection than a cloth mask.

WHERE CAN I GET ONE? In short supply. The advice is that medical masks should be saved for medical professionals. We found a box of 50 for £65.99 on medisave.co.uk.

DIY STORE DUST MASKS

DIY store mask (stock image)

DIY store mask (stock image)

WHAT IS IT? Dust masks and other disposable face masks all look similar, but levels of protection against particles that can pass through vary. If it says FFP1 then it’s a basic kind of dust mask (picture left).

COVID-19 EFFECTIVE? More protection than a surgical mask (only if it fits well). But with the lowest level of filtration for this kind of respirator mask (to meet European standards, they have to be able to filter at least 80 per cent of particles) it can’t filter out tiny particles associated with viruses and bacteria.

WHERE CAN I GET ONE? Normally at DIY stores from £1 a mask. Your best option is seeing if a local independent DIY store has stock and delivers.

CYCLING MASKS

Cycling mask (stock image)

Cycling mask (stock image)

WHAT IS IT? Neoprene anti-pollution masks. They contain an air filter to stop cyclists breathing in pollution in heavy traffic. But they are not regulated to the same standard as medical masks so protection levels can vary.

COVID-19 EFFECTIVE? While they are untested regarding coronavirus, they are intended to provide a layer of protection from airborne particles. Some are marketed as N95 or N99 grade (the U.S. equivalent to the European regulation rating: Filtering Face Piece, or FFP), which refers to airborne particles filtered — 95 or 99 per cent.

WHERE CAN I GET ONE? UK brand Cambridge Mask Company is taking pre-orders (pictured). Cycling masks are available from Amazon.

THE FFP3 mask

Medical-grade FFP3 mask (Stock image)

Medical-grade FFP3 mask (Stock image)

WHAT IS IT? Another respirator mask that eliminates even more small airborne particles than the N95/FFP2. FFP3 masks draw air through a filter embedded in the fabric that catches almost all airborne particles.

COVID-19 EFFECTIVE? Short of being a full-on gas mask affair, this is the best protection as long as it fits correctly. The mask blocks out 99 per cent of airborne particles.

WHERE CAN I GET ONE? In short supply, you can normally buy one at Wickes for under £3. The next step up is a heavy-duty reusable respirator used when spraying paint or chemicals — but not comfortable to wear all day.

Report by BETH HALE

 

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