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2) The study also did not measure how much healthcare worker masking affects patients. Including patients would result in about 2X higher benefit of N95s in preventing infections and even more for reducing harm because of the higher vulnerability of patients.

3) The study also did not consider two way masking which would bring the improvement by 10X up to 100X = 10X * 10X due to both the infected individual (source), and the individual who is not infected, wearing an N95 respirator.