Table 6 for the N95 mask row cites w45 and w47. w47 had only 13 people in the study. And both w45 and w47 cite a medium risk of bias noting lack of description

Table 6 for the N95 mask row cites w45 and w47. w47 had only 13 people in the study. And both w45 and w47 cite a medium risk of bias noting lack of description of controls and inconsistencies. It would be nice to have more rigorous studies to support the claim? Just to be clear, I do think people should wear masks! Seto 2003w47 13 healthcare workers infected with confirmed SARS within 2-7 days of exposure, with no community exposure w45 330 probable cases of SARS reported to Department of Health, Hong Kong