ability to work using the euthanasia program's facilities. In the UK the 1950s, homosexual men were given the choice between hormone therapy with female sex hormones or prison including, notably, Alan Turing. Until 2004, every European state required that transgender people must be sterilized or provably infertile to have their preferred gender formally recognised. This practice continued in Sweden until 2012 and Denmark until 2014 Japan currently requires transgender people to be sterilized and have their ovaries removed to be recognised as a different gender. Ethics and the law The Hippocratic Corpus, an ancient Greek text discussing medical ethics, advises that physicians conceal most information from patients to give the patients the best care. The 1767 English case Slater vs Baker and Stapleton found against two doctors who had refractured a patient's leg without consent. Thomas Percival was a British physician who published a book called Medical Ethics in 1803, which makes no mention of soliciting for the consent of patients or respecting their decisions. Percival said that patients have a right to truth, but when the physician could provide better treatment by lying or withholding information, he advised that the physician do as he thought best. Benjamin Rush an 18th-century United States physician, in a lecture entitled "On the duties of patients to their physicians", stated that patients should be strictly obedient to the physician's orders; this was representative of much of his writings. The US Canterbury v. Spence case established the principle of informed consent in US law. Earlier legal cases had created the underpinnings for informed consent, but his judgment gave a detailed and thought through discourse on the matter. The judgment cites cases going back to 1914 as precedent for informed consent. Infectious disease In response to the bubonic plague some city states restricted movement of people into them using cordon sanitaires, and separated those were suspected of being infected into makeshift camps. Merchant sailors were made to isolate in lazarettos, hospitals for infectious diseases. England created quarantine regulations in 1663 to confine ships suspected of being infected with the plague. In response to cholera outbreaks in the 1830s, some European cities people with symptoms were forced into lazarettos. An 1853 law in the United Kingdom made vaccination compulsory with those refusing to comply receiving fines. People with symptoms of tuberculosis have been detained in New York from 1902. During the Spanish flu pandemic western cities