The provisions of this chapter shall be construed to allow any isolated or quarantined person to choose his own treatment, whenever practicable and in the best interest of the health and safety of the isolated or quarantined person and the public; however, the conditions of any order of isolation issued pursuant to Article 3.01 (§ 32.1-48.01 et seq.) of this chapter involving a communicable disease of public health significance and any order of quarantine or order of isolation involving any communicable disease of public health threat pursuant to Article 3.02 (§ 32.1-48.05 et seq.) of this chapter shall remain in effect until the person or persons subject to such order of quarantine or order of isolation shall no longer constitute a threat to other persons.