Confidentiality is both common sense and professional convention, per the Hippocratic Oath, in the sense "I will respect the privacy of my patients, for their problems are not disclosed to me that the world may know" (Lasagna, 1964). It is an obligation not only of those who are called up to take the oath as a matter of course, but all healthcare professionals.
Are there instances in which private medical information should be revealed to others in order to protect individuals or the public from harm? Please explain your position using ethical reasoning and theories.