Eleven schools in the northwest Minnesota lakes area have been added to the Minnesota Department of Health's COVID-19 list, which indicates five or more students and staff have tested positive for the virus in the last 14 days. Currently, Detroit Lakes High School has six cases between students and staff, but masking requirements won't be implemented until the transmission rate rises above 3%, according to the district's mitigation plan. No other schools in the Detroit Lakes School District have more than five cases.