Authority. The Board of Health may promulgate regulations and orders to meet any emergency or to prevent a potential emergency caused by a disease dangerous to public health or any communicable disease of public health threat involved in an order of quarantine or isolation pursuant to §32.1-48.05et seq. The state health commissioner shall have the authority to require quarantine, isolation, immunization, decontaminationor treatment of any individual or group of individuals when he determines any such measure to be necessary to control the spread of any disease of public health importance and the authority to issue orders of isolation.