How to promote widespread usage of high quality, reusable masks

I think the idea of effective mask use has withstood sufficient criticism to warrant spreading aggressively, both to the public as well as experts in the field. It may be a mistake, but compared to no mask at all (risk of infection, barriers to reentering society) it is hard to see it being a significant mistake. The potential upside is significant. We may have a relatively cheap and safe countermeasure within reach.

Point 2 is fair, but do note that I did post this under question, so some degree of uncertainty is implied.

Point 3 seems like addressing a standard that is at the very least not consistently applied. I went back through all question posts of the last 6 months; this seems to be fairly similar in form to this question and does not contain a cost-benefit analysis either. And as already mentioned, it is still part of the question category.

1) I was aware of this podcast, and actually contemplated not posting because the superficial similarity between the topics might be a problem. First of all Lewis' criticism is not just slightly different, it's all about EA's discussion of cloth masks. About medical masks, which this post is about, he specifically says "medical masks are pretty good for the general population which I’ll just about lean in favor of, although all of these things are uncertain.". Furthermore I am uncertain whether one very recent expert's opinion should promote a huge shift in EA's consensus on this topic.

3. There does seem to be a cost-effectiveness analysis and so we don't know whether this is worth anyone's time.

Well, when comparing a typical price for these masks (was ~50$, nowadays they are mostly sold out) times number of people with the damage to the economy caused by lockdowns and social distancing, you don't relly need a calculator, do you? :)

I've also pointed out that they can be mass-produced, so distributing mask to everyone, at least in industrialized countries, should obviously be cost-effective.

1. See Greg Lewis interview on the 80k podcast (https://80000hours.org/podcast/episodes/greg-lewis-covid-19-global-catastrophic-biological-risks/) especially the last 25 mins on EA community mistakes on the c19 response (he mentions that facemasks in particular can actually be net negative - I realize this is slightly different, yet still applies to this post).

I would be really curious to know how a mask like this could have a negative effect. Risk compensation should obviously considered, but otherwise I'm coming up blank.

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