Rock County sets a new record involving COVID-19 infections.  The health department reports 75-people were hospitalized for COVID-19 as of Thursday.  The previous highest number of hospitalizations for COVID-19 was 74 in November of 2020.  The health department also reports 4421 active cases.  The age group with the most cases currently is 25-to-34-year olds.  Data from the health department also shows 63-percent of county residents are now fully vaccinated against COVID-19.