I doubt there is a single study to support this antithetical notion.
Face coverings work to prevent the spread of viruses, which is not to say they should be mandated for use by everyone.
Trying to win a political argument by attacking the science behind wearing a face covering only hurts your own position.
You have drank about ten gallons of leftist Koo-laid on this one. There is NO SCIENTIFIC EVIDENCE THAT WEARING A PIECE OF THIN FABRIC OVER YOUR FACE PREVENTS OR EVEN LESSONS THE CHANCE OF TRANSMISSION OF COVID-19 FROM AN INFECTED PERSON. NONE, ABSOLUTELY NONE. All we have are unsupported “models” based on unproven assumptions. “SCIENCE” and has become a meaningless political term when used by leftists. I suggest that you try to find an actual study not relying on models to support the belief that has been stamped into you by the mainstream media and political activists.