The board of directors may insure against any loss or liability of the county, or of the tuberculosis sanitarium, or the branches, dispensaries or auxiliary institutions of such sanitarium, or of any employee, agent or officer of such sanitarium, resulting from the wrongful or negligent act of such employee, agent or officer in the discharge of his duties within the scope of his employment.
     Such insurance shall be carried in a company licensed to write such coverage in this State. Every policy of such insurance shall provide, or be endorsed to provide, that the company issuing such policy waives any right to refuse payment or to deny liability thereunder by reason of the non-liability of the insured county, tuberculosis sanitarium or the branches, dispensaries or other auxiliary institutions of such sanitarium for the wrongful or negligent acts of its employees, agents and officers.