While physicians have a duty to treat even at the risk of their own personal safety, citizens also have minimal obligations to assist those protecting them during bioterrorism or natural disasters.
When a pregnant woman is knowingly causing harm to her unborn child, there are various legal interventions that can be taken to protect the rights if the fetus.
Physicians can ethically withhold information in situations where full disclosure of a diagnosis or treatment would cause great psychological harm to the patient.