The Illinois Department of Public Health Friday reported 34 Illinois counties, including two in western Illinois, who are considered to be at a warning level for COVID-19.

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Among the counties on this week’s warning list are Adams and Pike counties in western Illinois.

The reasons a county reaches a warning level vary, but officials say some common factors include an increase in cases and outbreaks that are associated with large gatherings, long-term care facilities, correctional centers or schools.

Through Thursday, Adams County had reported 101 new coronavirus cases, while officials in Pike County reported 31 new COVID cases.