Okla. Stat. tit. 56, § 111

The board of county commissioners of the counties throughout the state shall have power to erect buildings upon land occupied by county indigent care facilities for the isolation and treatment of all indigent persons who are afflicted with an illness or disease which makes it necessary that these measures be taken, and that the patients may, if the building is erected, be cared for out of the indigent care budget of the county of which the patients are residents.