Out of all the people in the United States who are HIV positive, up to one out of five are not aware of their condition. That’s just one of the interesting results highlighted by AIDSVu while preparing its most recent study.

The map above shows the number of people infected by the HIV virus per 100,000 people by county in the United States. The darkest red areas show the highest number of adults and adolescents with an HIV diagnose, 386 or more per 100,000 population. These numbers are concentrated along the East coast and Southern parts of the United States.

Source: AIDSVu: Persons Living with an HIV Diagnosis, 2010