Over 450 Duval County Public Schools employees say they need to self-isolate, the district said Monday.
This follows a survey sent out on Friday to school and district-based employees, asking where they worked and if they had left the country, according to WJCT News partner The Florida Times-Union.
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Those returning from foreign travel were instructed to self-isolate for 14 days.
Shortly after the survey was sent out, the district announced spring break would be extended through March 23.
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