That’s why I’m not sure how to interpret this.
That said, I’d tend to expect in the presence of masks, while probably increasing people going out, people may be primed to be more cautious (a bit like a benign relative of the weapons effect] - the possibility of it increasing anxiety might be why Czechs went for friendly designs)
In the video linked above, there’s evidence presented that t-shirts can block 70% of 20 micron particles (2013 study looking at preparedness) vs surgical mask at 89% (presumably the N95 respirator is even higher).
- Part of what’s being presented is using masks to reduce stuff we breathe out (this being mainly droplet rather than aerosol), rather than what we breathe in.
- Also, the fact it reduces face touching is an argument I heard early on, which seems pretty intuitive.
- For improvised masks, the “don’t take PPE away from frontline healthcare workers” argument drops away.
Still not sure where I land on this, but this makes it sounds less one-sided than the current stance in most Western countries - particularly when restrictions relax - e.g. if we’re going to end up with on-off movement restrictions over the next year or so.