The scientific consensus was that there was no evidence that mask would work (or not work) for 2019-nCoV. There's plenty of evidence that it helps prevent transmission of other respiratory viruses.
So which hypothesis would have most likely been true at the time? Not to mention that Dr. Fauci himself had admitted that it was a noble lie (aka pure propaganda and falsehoods).
So which hypothesis would have most likely been true at the time? Not to mention that Dr. Fauci himself had admitted that it was a noble lie (aka pure propaganda and falsehoods).