>>348
一応貼るけども、どう勘違い出来るの？
まさか有意差なしを効果なしと言うのは間違いだとか遵守率がーとでも？

https://cochrane.org/CD006207/ARI_do-physical-measures-such-hand-washing-or-wearing-masks-stop-or-slow-down-spread-respiratory-viruses