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That sounds like an unethical control test and would therefore not be considered.

And would probably require a BSL 3 facility anyways and I don't think you could find one set up for hairdressing. The shortage of BSL 3 facilities that can do science on SARS-2 is one of the things really slowing down our understanding of many aspects of this virus.

That’s basically why all studies on whether masks are useful (this is not a first epidemic, not even a first coronavirus epidemic) are inconclusive.

Not really. Randomized controlled trials have been done.

The experiment isn’t unethical - it’s just that it hasn’t been done often because all of the other, less-complicated experiments, also show very little effect.

>Randomized controlled trials have been done.

Do you have any examples?

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