THE MASK COMES OFF: Determined to defend face coverings, a Scientific American article dismisses scientific “rigor.”
In response, [Naomi Oreskes, a Harvard professor of the history of science] claimed that “[t]he Cochrane finding was not that masking didn’t work but that scientists lacked sufficient evidence of sufficient quality to conclude that they worked.” She continues, “Jefferson erased that distinction, in effect arguing that because the authors couldn’t prove that masks did work, one could say that they didn’t work. That’s just wrong.” But Jefferson didn’t simply say that masks don’t work; he said there’s “no evidence” they work. The burden of proof should be on the side of those advocating a medical intervention. Without remotely having met that burden, Oreskes asserts that masks do work. Cochrane, she writes, “gave the false impression that masking didn’t help.”
In fact, 16 RCTs have tested whether masks effectively reduce the spread of viruses. Not onehas found compelling evidence that they do. Two have found statistically significant evidence that masks are counterproductive—that they increase the spread of viruses—probably because masks are frequently moist or dirty, and people often touch them. As for non-RCT evidence, check out this chart by Ian Miller, which shows that mask-mandate and mask-free states registered almost identical Covid-19 case rates.
Surgical masks were designed to protect patients from having open wounds infected by medical personnel, not to prevent the spread of viruses. N95 masks were designed to protect workers from breathing in fumes, smoke, or dust. When N95s were worn in hospitals pre-Covid, it was usually to protect against the spread of tuberculosis bacteria, not to stop the spread of viruses. As an article on the National Institutes of Health website puts it, “Viruses are tiny. . . . Billions can fit on the head of a pin.” Bacteria are huge by comparison: “Bacteria are 10 to 100 times larger than viruses.” Trying to block a virus with a mask is like trying to keep mosquitos out of your yard with a chain-link fence.
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