Primum non nocere is a Latin phrase that means “first, do no harm.

Non-maleficence, which is derived from the maxim, is one of the principal precepts of bioethics that all healthcare students are taught in school and is a fundamental principle throughout the world. But yet a great number of the Nazi physicians ignored this principle. Karl Brandt being one of the worst of them.

Today is the 68th anniversary of his execution.