The answer is bioethics. This umbrella science deals with the study and resolution of moral dilemmas stemming from the present and future applications of health-related sciences on humans.
Some of the fields under the reflection of bioethicists include: clinical ethics i.e. conflicts of interest in practice of healthcare; health policy i.e. healthcare as a public good; genetics i.e. the study of dna implications for reproduction; and neuroethics i.e. the boundaries of brain manipulation.