>> Was there any real world information on how effective masks are?
There's plenty of results on Google to suggest they're effective at catching exhaled droplets which is the purpose for which they're intended. Assuming they're worn properly of course. Observation of people not wearing them properly makes one realise why contraception can be unreliable!!
Less so at protecting the user as you're quite likely to pick up virus touching something and then transferring it by touch to your face. I don't think anybody has managed to avoid touching their face. Certainly all five participants in the Zoom meeting I was in this morning were touching their faces whether to scratch or cover up a guffaw of laughter.
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