Dr. Moon is known for advocating informed consent and freedom of speech within medical education and the doctor-patient relationship. She became publicly prominent after expressing concerns about COVID-19 vaccines for children, which led to professional consequences. She relinquished her state medical license under duress following warnings from her employer, Washington State University, that she would be reported for her public comments against vaccinating children to prevent COVID-19. Dr. Moon, along with other physicians, has legally challenged the state’s medical regulators, arguing for free speech rights and against disciplinary action for dissenting medical opinions regarding COVID-19 treatments and vaccination policies.