I heard a medical professional bound for West Africa declare that "If we have the ability to help people, then we have the duty to do it."
He felt the sense of duty overrides the pending danger of Ebola. It reminded me of the Nightingale Pledge.
Truly a noble sentiment.
Unfortunately in the United States that duty is followed up with the threat of... After we've 'cared' for you, if you do not pay us the exorbitant and extortionist fees we charge, then we have the right and even the 'duty' to destroy your life and take everything from you.
So much for 'Do no harm'.