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Students wearing face masks attend a class during the first day of a new school year in Sale, Morocco, on Oct. 1, 2021. Students returned to school in Morocco as the 2021-2022 school year began on Friday. (Photo by Chadi/Xinhua)
Students wearing face masks attend a class during the first day of a new school year in Sale, Morocco, on Oct. 1, 2021. Students returned to school in Morocco as the 2021-2022 school year began on Friday. (Photo by Chadi/Xinhua)