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At least two exploratory studies (done decades ago) demonstrated no difference in the outcome for patients between those operated on by surgical teams with masks and those operated on by teams w/o masks. Surgical masks protect only the surgical team members from splashes of biological fluids from the patient. It seems nobody is interested in performing full-fledged studies because the surgical mask use by the medical establishment is now a tradition, and masking up prior to surgery is akin to a religious ritual.

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