A paper published in Archives of Disease in Childhood found that real-world effectiveness of child mask mandates to prevent COVID-19 transmission and infection has "not been demonstrated with high-quality evidence" and that "the current body of scientific data does not support masking children for protection against COVID-19." "There were no radomised controlled trials in children assessing the benefits of mask wearing to reduce SARS-CoV-2 infection or transmission," [said the study]. "The six observational studies reporting an association between child masking and lower infection rate or antibody seropositivity had critical (n=5) or serious (n=1) risk of bias; all six were potentially confounded by important differences between masked and unmasked groups and two were shown to have non-significant results when reanalysed. Sixteen other observational studies found no association between mask wearing and infection or transmission. Real-world effectiveness of child mask mandates against SARS-CoV-2 transmission or infection has not been demonstrated with high-quality evidence." The importance of this study is that it examined the risks of bias among studies across the board. The higher the risk of bias in a study, the less trustworthy its results can be. The authors of the study pointed out that the risk of bias in studies across the board was present ... but that in the best studies out there (least bias) no benefit was found for masking children.