Both Tegan and I decided to start masking early on in the pandemic, well before anyone was requiring it. Sometimes, it was something close to useless like a bandanna, but since Tegan had a customer service job in Glasgow, she made herself a couple multi-layer masks, and I eventually bought a neck gaiter with disposable filter inserts. I’ve always viewed the mask question from something of a gamer’s perspective on odds. Back when I was an avid World of Warcraft player, I had to pay close attention to cumulative percentages. Any one piece of gear, while helpful, wasn’t as useful as all of it together, whether it came to your chance of landing a critical strike, or your chance of blocking or dodging an enemy’s attack.
I don’t expect the vaccine to protect me entirely, just to improve my odds. Masks are the same – they might only stop a small percent of particles I’d otherwise inhale, but that still improves my odds of staying healthy. I wouldn’t expect my masks to do anything to stop the fine particulate air pollution I’ve mentioned in the past, but yeah – they provide one very imperfect physical barrier between myself in the world. How could it not be better than nothing? After the last couple years, it just feels like common courtesy to mask.
Still, some people adamantly oppose masking, and will insist that the science shows no clear benefit. Obviously I disagree, but I think it’s fair to be doubtful, especially with so many contradictory messages out there. Rebecca Watson takes on that uncertainty, and a recent report on the efficacy of masks. The TL:DR is that masks do help with COVID, at least a little, but also that the people who put the report together did so in such a way as to give the impression that they don’t.
As always, you can find the video’s transcript and sources on Skepchick, but I just wanted to highlight one thing:
“But wait,” you may be saying, “my MAGA uncle says that Cochrane Review says masks don’t work. What’s going on?”
[..]
The review is titled “Physical interventions to interrupt or reduce the spread of respiratory viruses,” and it is available in full online and as always I link to all my sources in the transcript which you can find linked below or at patreon.com/rebecca. This review did conclude that “Wearing masks in the community probably makes little or no difference to the outcome of influenza-like illness/COVID-19 like illness compared to not wearing masks.”
Immediately, you might note that this is about “respiratory viruses,” and not specifically COVID-19. That’s important, because they lumped in a few studies on the effectiveness of masks versus COVID along with a whole bunch of studies on non-epidemic influenza, which is way less contagious and rarer to contract, meaning that of course you’re going to need way more data to show any result, compared to looking at masks in the middle of the COVID-19 pandemic.
In fact, epidemiologist Gideon Meyerowitz-Katz decided to remove the data for influenza to see what would happen, and sure enough, the random controlled trials for masking DURING A PANDEMIC showed a clear, modest benefit. He points out that the review is perfectly fine otherwise, but personally I think it’s a pretty big deal that Cochrane released this during a pandemic, knowing that people would assume that the conclusion would be applied during a pandemic. It’s like releasing a review concluding there’s no benefit to wearing a seat belt, without mentioning that most of the data I examined was from a survey of people sitting in parked cars in the grocery store parking lot. It turns out that context is very important!
This frustrates me. Scientists ought to know how important context is, and I find it hard to believe that they don’t know how much confusion there is on this particular topic. I suppose I’ll never know for sure whether the way they structured their report was deliberate, but I feel like the responsible thing to do would have been to write a paper that wouldn’t create this kind of confusion. Still, it’s nice to have a bit more support for my position. As I said before, I think masking in indoor public spaces is just a matter of courtesy.
Now, I’m not always the most courteous guy – sometimes I forget a mask when I go out, or I don’t have one that’s clean. I also eat at restaurants on rare occasions, and if you’re in some form of eatery, wearing a mask seems a bit like spitting in the wind. I’m also aware that my opinion on “common” courtesy isn’t particularly common – the vast majority of folks in Dublin don’t wear masks anymore, and based on the consistently low COVID numbers, that doesn’t seem to be doing a whole lot of harm. It helps that we’ve got a pretty high vaccination rate. The Kraken may have originated here, but it didn’t turn out to be much of a monster.
Masks work, in that they improve your odds. That’s a limited and uncertain benefit, but the reality is that we are beset by uncertainties at every moment in our lives. Accepting that is – or ought to be – a natural process of growing up and maturing, but obviously it’s not a comfortable process, and most people are trained, to some degree, to reject uncertainty. The distressing truth is that this world is messy and complicated, and sometimes when you’re dealing with a mess, it’s better to just wear a mask.
