Teresa Patton, a night custodial supervisor with the Fort Zumwalt School District, sprays a bleach disinfectant in the classrooms of Progress South Elementary in O'Fallon, Mo., Thursday, March 12, 2020. With the introduction of the coronavirus the district purchased three additional machines to clean 2 million square feet of space inside the district's buildings. Students are scheduled to return Monday from break. (Robert Cohen/St. Louis Post-Dispatch via AP)
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