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[–]OrneryStruggle 2 insightful - 1 fun2 insightful - 0 fun3 insightful - 1 fun -  (0 children)

Yes, stopping the spray of saliva and mucus when you cough or sneeze (i.e., are having a symptom of illness) prevents the spread of symptomatic illness. Your elbow also is not porous.

This does not at all translate to "common knowledge" that masks reduce the spread of respiratory diseases. In fact there is basically no high quality evidence of any kind that masks reduce the spread of respiratory diseases, ESPECIALLY in asymptomatic people who likely cannot spread them at all. If there were any such evidence someone would have produced and acknowledged it already, but no one appears to be able to find any.

You are entirely wrong that any gathered data suggests sarscov2 is spread by asymptomatic people. No such data exists.