The rate of new COVID-19 cases in McHenry County increased by 40% since last week and increased by a factor of five over the course of April, county health department data shows.

The level of COVID-19 spread in McHenry County has risen to medium after two months of low transmission, the McHenry County Department of Health reported Friday.

There are now 13 counties, plus the city of Chicago, that are at “medium” risk for COVID-19, according to new data from the Illinois Department of Public Health released Friday. Illinois also announced the most new COVID-19 cases in a single day since Feb. 4.