I appreciate you coming up with innovative ideas to stop C19, but I strongly downvoted this for the following reasons:
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).
2. especially here you have a direct call to action to spread this aggressively on social media.
3. There does seem to be a cost-effectiveness analysis and so we don't know whether this is worth anyone's time.
But I think it's important for people to come up with innovative ideas. I think what would be better is to send this directly to junior people in this field (say junior authors of this paper: https://www.cam.ac.uk/research/news/study-identifies-275-ways-to-reduce-spread-of-coronavirus-following-lockdown and ask them whether this might be something interesting - the ideas being that they're in a better position to judge whether it's really effective policy and worth more senior people's currently very precious time and pass it on to them.
I agree with the approach of individuals controlling spread through cheap effective masks. If the portal of entry and exit of this virus is the mouth, nose and eyes, (fecal is debateable) then if everyone contained transmission through these openings, the pandemic would be over.
There is a lot of talk about vaccines and treatments and seclusion, but these are complex, prone to failure, and have very clear negative/unintended consequences.
Effective masks are simple, can be implemented rapidly, confer benefits at the margin, and the negative consequences are harder to see, although certainly worth considering (ie- making it harder for healthcare workers).
Therefore, we should look hard for cheap effective masks, or demonstrate why it's a bad idea.
I also agree that the seal is important as well as reusability.
My hospital uses full face snorkel masks with N-99 filter, though this is extremely uncomfortable for significant periods of time and difficult to talk. These masks exist in large affordable quantities on Amazon/Walmart. I'm working on making adjustments to this for comfort, but not making a lot of progress. https://www.pneumask.org/
The benefit appears to be that it covers the eyes as well as the mouth nose, but the cost of comfort is not worth it long term.
Another challenge is fashion. It just feels weird to wear an intense-looking mask in public. It may be worthwhile to spend some time pushing on this area, especially because there is some stigma to not wearing a mask at all.