A new Danish study out this morning has found no statistical difference in wearing masks versus not wearing masks as it applies to transmitting COV-19.
The NY Times reported that the study by researchers in Denmark asserts that surgical masks did not protect the wearers against infection with the coronavirus in a large randomized clinical trial.
The study, published in the Annals of Internal Medicine, did not contradict growing evidence that masks can prevent virus transmission from the wearer to others. But the conclusion is at odds with the view that masks protect the wearers — a position endorsed just last week by the Centers for Disease Control and Prevention.
They studied over 6,000 participants, and half wore surgical masks. The others were told not to wear masks in public. Just under 5,000 completed the study. About 42 people, or 1.8 percent, were infected compared with 53 in the unmasked group, or 2.1 percent. There was no statistical difference.
Other studies suggest masks do work.
The CDC cites several studies showing masks work, but most were controlled laboratory studies.
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