We need a Hippocratic Oath for the medical profession. How many doctors honestly "First do no harm"? Seriously, my father was killed by them and my best friend

We need a Hippocratic Oath for the medical profession. How many doctors honestly "First do no harm"? Seriously, my father was killed by them and my best friend was seriosly injured. If they would have never visited doctors they would still be alive or still walking.