I'm standing on the hill with a victory flag
OBJECTIVES. Throughout the coronavirus disease 2019 (COVID-19) pandemic, masking has been a widely used mitigation practice in kindergarten through 12th grade (K–12) school districts to limit within-school transmission. Prior studies attempting to quantify the impact of masking have assessed...
publications.aap.org
RESULTS
1,112,899 students and 157,069 staff attended 61 K–12 districts across 9 states that met inclusion criteria. The districts reported 40,601 primary and 3,085 secondary infections. Six districts had optional masking policies, 9 had partial masking policies, and 46 had universal masking. Districts that optionally masked throughout the study period had 3.6 times the rate of secondary transmission as universally masked districts. For every 100 community-acquired cases, universally masked districts had 7.3 predicted secondary infections, while optionally masked districts had 26.4.
Mask mandates dropped secondary infection rates nearly 4-fold where they were implemented.
Now that infections have dramatically dropped in most places, we can put them away. But that doesn't mean forgetting they worked.