Health Protection (Coronavirus, Wearing of Face Coverings in a Relevant Place and on Public Transport) (England) (Amendment) (No. 2) Regulations 2020

Baroness Finlay of Llandaff Excerpts

Monday 12th October 2020 Lords Chamber

[Baroness Finlay of Llandaff (CB) [V]]

My Lords, I declare that I am on the BMA ethics committee. I want to consider what we know, what we are doing and where our duty in society lies.

Masks are increasingly reported to be protective. I thank the Minister for his brief summary, but I add to it that no evidence has emerged that they are harmful in Covid transmission. The coronavirus is tiny, 0.1 micrometres across, less than one-800th of a human hair in diameter, but it does not leave the body on its own; it relies on aerosols and droplets to spread, and it goes however far that mist takes it. Think of tobacco smoke spreading; once you get beyond two metres and are not downwind, you are less likely to inhale much of it, even though the aerosol lingers in the air for a long time. Do not forget that in indoor spaces that can be for many hours, which is why the BMA wants masks worn in offices even when alone.

This aerosol, often minute droplets of around double the width of the virus itself, is partly caught in the fibres of a mask. Masks made of double layers of tightly woven mixed fabrics, such as silk and fine cotton, seem to decrease aerosol transfer by up to about one-fifth. The standard mask for use in healthcare settings with aerosol-generating procedures is the N95 respirator mask, which is designed to protect the wearer by filtering out 95% of airborne particles that measure 0.3 micrometres or larger. A review of observational studies estimates that such surgical and comparable cloth masks are around 67% effective in protecting the wearer. That figure may be even higher for the G variant of the virus that seems to transmit faster, but we do not yet know that.

The other protective effect of a mask is that it can cut the viral count inhaled by up to 60%. Where masking reduces the dose of virus that a wearer might receive, it seems that the resulting infection is milder or even asymptomatic, whereas a large viral load results in a more aggressive inflammatory response. So wearing the suitable mask protects the wearer as well as protecting others if the wearer is excreting virus. In Hong Kong a new type of reusable fabric mask, CuMask+, will be issued to all citizens. This patented six-layer mask is washable 60 times and incorporates copper as a key filtering component, although there is some dispute over the extent of claims of efficacy.

What of mask deniers? I am afraid that they are still out there. The inconvenience of wearing a mask is tiny for most of us. Those who lipread for whatever reason need to see a person’s mouth and a very small number of people cannot tolerate a mask, so exceptions are appropriate. For the rest of us, it is only a slightly increased effort to breathe through the mask and cope with fogged-up glasses—although proper eye protection is associated with less infection. However, we all have a duty to others—the ethical principles of justice and that we do not cause harm. We have no idea if the person that we passed in the shop, the street or elsewhere is in a high-risk group and should be shielding.

Thin, disposable masks are not adequately protective, and there are now more masks than jellyfish in some seas. It is predicted that 75% of throwaway masks will end up in landfill or in oceans. The ecological effect will be long-lasting, as these masks last 450 years before degrading. What is the Government’s policy to radically decrease mask litter? Why are we not providing advice on how to recycle masks—for example, by hot-ironing cloth ones?

I stress, as I have before and as Distance Aware aims to stress, that the most important measures are social distancing and hand washing. Is the word “space” used simply because it rhymes with “face”? Is there evidence that the public know that this means the two-metre rule? Will the Government make it crystal clear that the two-metre distancing rule is more important than anything else, and that masks can be an adjunct of that but no substitute for it? Other than fines, what is being done to empower those who deserve to be protected when confronted by someone who is simply too selfish to wear a mask properly and thinks it is funny to hang it around their chin or off one ear? I hope we are at the end of mixed messages and that social duty towards each other will define what we do.