[AstralStorm]

You do not have to be a qualified doctor to check the sources. You do have to be thorough in checking the consensus and recommendations of major health organisations and verify scientific papers, a lot of which is published in the open on for instance PubMed, big name journals etc.

This one was easy - the claim was not backed by any amount of previously published research.

It is legal and easy to check for a registered trial. Something this big and cheap and likely to have major consequences should have been pre-registered. (Literally deadly consequences.)

And even if it were, it should be reproduced first before being followed by general public.

Most importantly article claims that it is unnecessary to wear masks, while the trial did not involve masks at all.