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The Illinois Department of Public Health has moved DeKalb County to a warning level for COVID-19 spread. The county has a test positivity rate of 8.4 percent, up from 4.9 percent just last week. There have been 122 new COVID-19 cases per 100,000 people, up from from 57 cases last week. Targets are to be below eight percent positivity and fewer than 50 new case per 100,000 people.

The DeKalb County Health Department says the spike in cases is a result of students retuning to Northern Illinois University in DeKalb. Through its investigation, the department determined that the majority of new cases were linked parties and large gatherings in and around campus. New guidelines will be put in place for NIU students to try to reduce the growing numbers.

DeKalb is among thirty counties put at warning level Friday. Grundy County is among them. Grundy County is seeing 143 new cases per 100,000 and has a test positivity rate of 9.3 percent.