Three studies show mask mandates help keep coronavirus from spreading in schools "Mask mandates keep the coronavirus from spreading in schools, according to three studies published on Friday by the Centers for Disease Control and Prevention. The findings call into question continued efforts by some Republican governors to fight mask mandates in schools. One of the three studies compared masking policies in Maricopa and Pima counties, the largest in Arizona. In both counties, some school districts imposed mask mandates while others did not. Those that did saw far lower likelihood of the coronavirus spreading among students." Masks help keep schools open, CDC finds Anti-maskers can crawl back under their rocks now.