Is it true that is there a county general hospital in chicago based on the following text?

County General Hospital, a fictional hospital that served as the setting for the NBC serial medical drama ER, was loosely based on Cook County Hospital. Cook County Hospital is also used in the 1993 movie The Fugitive. The documentary I Call It Murder aired on the BBC television show Man Alive in 1979, which reported on the challenges facing the staff at Cook County Hospital. At that time, the hospital was one of the few free hospitals in the United States. In 1996, Diana, Princess of Wales visited patients and doctors in the AIDS ward and trauma center, while on a tour of Chicago.
no