Three new cases of coronavirus were confirmed in Sonoma County on Sunday, increasing the number of local cases to 58 as the virus continues to spread in the United States.

Thirteen residents are being treated at area hospitals and 13 have recovered from the virus, the county reported Sunday.

Demographic information about the patients, withheld by public health officials until Friday when the county recorded its 50th case, show a disease that does not discriminate based on age, gender or location.

Twenty-eight of those diagnosed with coronavirus are in the 18-49 age group, 20 are 50-64 and 10 are 65 or older. Cases have come from throughout the county, according to county data.

Sonoma County Public Health Officer Dr. Sundari Mase said the demographic data is about what she expected to see, with one possible exception: She is pleased to see so few cases among people 65 and older.