It has long been recognized that a privilege to act is a perfect defense to liability for a non-consensual, intentional interference with another person. This privilege is based upon self defense, defense of third persons, mistake, or various other recognized legal theories. Even a state may have a privilege to interfere with the person of a citizen, and this privilege may extend to an interference to provide an infant citizen with medical care without the consent of, or against the express wishes of, the parent or guardian.
James A. Baker, Court Ordered Non-Emergency Medical Care for Infants, 18 Clev.-Marshall L. Rev. 296 (1969)