MINNEAPOLIS (WCCO) — Officials from Kasson-Mantorville Schools near Rochester say students in grades seven through 12 will transition to a hybrid learning model after a rise in COVID-19 cases.

The School Board voted Monday night to shift the learning model starting October 5. The board cited “exponential growth” of COVID-19 in Dodge County as their reasoning.

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According to the Dodge County Public Health (DCPH), there were 21 new positive cases in the county over the weekend — 8 of those are 5-18-year-old students in multiple districts.

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DCPH’s expects cases to reach 42 by this Thursday. The cases are expected to be even higher the following week. Officials say there is now reason to believe there is “in-school” transmission.

As of Tuesday, two additional positive cases were confirmed at the high school, bringing the total to five in the past four school days.

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Prekindergarten through sixth grade will remain in-person.